keyword
https://read.qxmd.com/read/38530089/photocatalytic-hydrogen-production-with-a-molecular-cobalt-complex-in-alkaline-aqueous-solutions
#1
JOURNAL ARTICLE
Ping Wang, Nghia Le, John Daniel McCool, Bruno Donnadieu, Alexander N Erickson, Charles Edwin Webster, Xuan Zhao
The thermodynamic favorability of an alkaline solution for the oxidation of water suggests the need for developing hydrogen evolution reaction (HER) catalysts that can function in basic aqueous solutions so that both of the half reactions in overall water splitting can occur in mutually compatible solutions. Although photocatalytic HERs have been reported mostly in acidic solutions and a few at basic pHs in mixed organic aqueous solutions, visible-light driven HER catalyzed by molecular metal complexes in purely alkaline aqueous solutions remains largely unexplored...
March 26, 2024: Journal of the American Chemical Society
https://read.qxmd.com/read/38526525/unassisted-photoelectrochemical-h-2-o-2-production-with-in-situ-glycerol-valorization-using-%C3%AE-fe-2-o-3
#2
JOURNAL ARTICLE
Sarang Kim, Dongrak Oh, Ji-Wook Jang
Photoelectrochemical (PEC) H2 O2 production via two-electron O2 reduction is promising for H2 O2 production without emitting CO2 . For PEC H2 O2 production, α-Fe2 O3 is an ideal semiconductor owing to its earth abundance, superior stability in water, and an appropriate band gap for efficient solar light utilization. Moreover, its conduction band is suitable for O2 reduction to produce H2 O2 . However, a significant overpotential for water oxidation is required due to the poor surface properties of α-Fe2 O3 ...
March 25, 2024: Nano Letters
https://read.qxmd.com/read/38526168/constructing-sequential-type-ii-heterojunction-cqds-bi-2-s-3-tinbo-photoanode-with-superior-charge-transfer-capability-toward-stable-photoelectrochemical-water-splitting
#3
JOURNAL ARTICLE
Yanjie Pan, Zhenbiao Dong, Dongmei Qin, Baopeng Liu, Lulu Cui, Sheng Han, Hualin Lin
Efficient charge transfer and light-trapping units are pivotal prerequisites in the realm of Ti-based photoanode photoelectrochemical (PEC) water splitting. In this work, we successfully synthesized a ternary carbon quantum dots/Bi2 S3 quantum dots/Nb-doped TiO2 nanotube arrays (CQDs/Bi2 S3 /TiNbO) composite photoanode for PEC water splitting. CQDs/Bi2 S3 /TiNbO composite photoanode exhibited a considerably elevated photocurrent density of 8.80 mA cm-2 at 1.23 V vs the reversible hydrogen electrode, which was 20...
March 25, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38526055/ptcu-alloy-modified-triptycene-based-polymer-with-charge-separation-for-photocatalytic-hydrogen-evolution-from-water-seawater
#4
JOURNAL ARTICLE
Jian Zhang, Xinglong Li, Zheng Peng, Xiuzheng Deng, Yanan Wang, Zhongyu Li, Qian Liang
Direct photocatalytic hydrogen from earth-abundant seawater is a great potential way to achieve sustainable and clean energy, yet unsatisfactory decomposition and rapid electron-hole pair recombination of catalysts hinder the solar-driven H2 conversion efficiency. Herein, we designed a series of PtCu alloy nanoparticle-modified porous triptycene-based polymers (Pt x Cu1 -TCP) to construct the heterostructure for highly efficient hydrogen generation from photocatalytic water/seawater splitting. Characterizations displayed that TCP with an ultrahigh surface area can confine the agglomeration of PtCu alloy; meanwhile, the PtCu alloy can facilitate the rapid electron transfer from TCP...
March 25, 2024: Inorganic Chemistry
https://read.qxmd.com/read/38512809/carbon-dots-synthesis-characterizations-and-recent-advancements-in-biomedical-optoelectronics-sensing-and-catalysis-applications
#5
REVIEW
Rohan Lamba, Yukta Yukta, Jiban Mondal, Ram Kumar, Balaram Pani, Bholey Singh
Carbon nanodots (CNDs), a fascinating carbon-based nanomaterial (typical size 2-10 nm) owing to their superior optical properties, high biocompatibility, and cell penetrability, have tremendous applications in different interdisciplinary fields. Here, in this Review, we first explore the superiority of CNDs over other nanomaterials in the biomedical, optoelectronics, analytical sensing, and photocatalysis domains. Beginning with synthesis, characterization, and purification techniques, we even address fundamental questions surrounding CNDs such as emission origin and excitation-dependent behavior...
March 21, 2024: ACS Applied Bio Materials
https://read.qxmd.com/read/38511283/advances-in-zeolitic-imidazolate-framework-based-catalysts-for-photo-electrocatalytic-water-splitting-co-2-reduction-and-n-2-reduction-applications
#6
REVIEW
Jiaorong Wang, Lihong Yuan, Pan Zhang, Jing Mao, Jiajie Fan, Xiao Li Zhang
Harnessing electrical or solar energy for the renewable production of value-added fuels and chemicals through catalytic processes (such as photocatalysis and electrocatalysis) is promising to achieve the goal of carbon neutrality. Owing to the large number of highly accessible active sites, highly porous structure, and charge separation/transfer ability, as well as excellent stability against chemical and electrochemical corrosion, zeolite imidazolate framework (ZIF)-based catalysts have attracted significant attention...
March 21, 2024: Nanoscale
https://read.qxmd.com/read/38500400/metal-organic-frameworks-derived-nanocarbon-materials-and-nanometal-oxides-for-photocatalytic-applications
#7
JOURNAL ARTICLE
Jun-Qing Ye, Shu-Ying Xu, Qian Liang, Yan-Zi Dai, Ming-Yang He
Harnessing low-density solar energy and converting it into high-density chemical energy through photocatalysis has emerged as a promising avenue for the production of chemicals and remediation of environmental pollution, which contributes to alleviating the overreliance on fossil fuels. In recent years, metal-organic frameworks (MOFs) have gained widespread application in the field of photocatalysis due to their photostability, tunable structures, and responsiveness in the visible light range. However, most MOFs exhibit relatively low response to light, limiting their practical applications...
March 18, 2024: Chemistry, An Asian Journal
https://read.qxmd.com/read/38497927/strain-induced-excellent-photocatalytic-performance-in-z-scheme-bluep-%C3%AE-sns-heterostructures-for-water-splitting
#8
JOURNAL ARTICLE
Quan Li, Jiabao Wang, Hao Huang, Guangting Zhao, Ling-Ling Wang, Xiaojun Zhu
Constructing Z-scheme heterojunction photocatalysts with high solar-to-hydrogen (STH) efficiency is a practical alternative to produce clean and recyclable hydrogen energy on a large scale. This paper presents the design of stable Z-scheme blue phosphorene (BlueP)/γ-SnS heterostructures with excellent photocatalytic activities by applying strains. The first-principles calculations show that the BlueP/γ-SnS heterobilayer is a type-I heterojunction with an indirect bandgap of 1.41 eV and strong visible-light absorption up to 105 cm-1 ...
March 18, 2024: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/38493649/unveiling-the-effect-of-the-structural-transformation-of-cozn-mof-on-bivo-4-photoanode-for-efficient-photoelectrochemical-water-oxidation
#9
JOURNAL ARTICLE
Chenchen Feng, Houyu Fu, Xiaojiao Shao, Faqi Zhan, Yiming Zhang, Lei Wan, Wei Wang, Qi Zhou, Maocheng Liu, Xiang Cheng
Photoelectrochemical (PEC) water splitting has been widely investigated for solar-to-hydrogen conversion. However, issues like high charge recombination rate and slow surface water oxidation kinetics severely hinder its (PEC) conversion efficiency. Herein, we constructed MOF-derived CoOOH cocatalyst on BiVO4 photoanode, using a feasible electrochemical activation strategy. The BiVO4 -based photoanode obtained shows a high photocurrent density of 3.15 mA/cm2 at 1.23 VRHE and low onset potential. Detailed experiments and theoretical calculations show that during the activation of CoZn-MOFs, there was a partial breakage of 2-methylimidazole (mIM) linker, an increase in the oxidation state of Cobalt ion (Co), and increased O2- ...
March 6, 2024: Journal of Colloid and Interface Science
https://read.qxmd.com/read/38490989/bubble-water-catalyst-triphase-interface-microenvironment-accelerates-photocatalytic-oer-via-optimizing-semi-hydrophobic-oh-radical
#10
JOURNAL ARTICLE
Guanhua Ren, Min Zhou, Peijun Hu, Jian-Fu Chen, Haifeng Wang
Photocatalytic water splitting (PWS) as the holy grail reaction for solar-to-chemical energy conversion is challenged by sluggish oxygen evolution reaction (OER) at water/catalyst interface. Experimental evidence interestingly shows that temperature can significantly accelerate OER, but the atomic-level mechanism remains elusive in both experiment and theory. In contrast to the traditional Arrhenius-type temperature dependence, we quantitatively prove for the first time that the temperature-induced interface microenvironment variation, particularly the formation of bubble-water/TiO2 (110) triphase interface, has a drastic influence on optimizing the OER kinetics...
March 15, 2024: Nature Communications
https://read.qxmd.com/read/38488153/bodipy-chemisorbed-on-sno-2-and-tio-2-surfaces-for-photoelectrochemical-applications
#11
JOURNAL ARTICLE
Josephine A Jayworth, Cristina Decavoli, Matt D Capobianco, Jan Paul Menzel, Spencer R Adler, Conrad A Kocoj, Jessica G Freeze, Robert H Crabtree, Peijun Guo, Victor S Batista, Gary W Brudvig
Advancement toward dye-sensitized photoelectrochemical cells to produce solar fuels by solar-driven water splitting requires a photosensitizer that is firmly attached to the semiconducting photoelectrodes. Covalent binding enhances the efficiency of electron injection from the photoexcited dye into the metal oxide. Optimization of charge transfer, efficient electron injection, and minimal electron-hole recombination are mandatory for achieving high efficiencies. Here, a BODIPY-based dye exploiting a novel surface-anchoring mode via boron is compared to a similar dye bound by a traditional carboxylic acid anchoring group...
March 15, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38487269/understanding-the-internal-conversion-efficiency-of-bivo-4-sno-2-photoanodes-for-solar-water-splitting-an-experimental-and-computational-analysis
#12
JOURNAL ARTICLE
Laura Geronimo, Catarina G Ferreira, Valentina Gacha, Dimitrios Raptis, Jordi Martorell, Carles Ros
This work aims to understand the spin-coating growth process of BiVO4 photoanodes from a photon absorption and conversion perspective. BiVO4 layers with thicknesses ranging from 7 to 48 nm and the role of a thin (<5 nm) SnO2 hole-blocking layer have been studied. The internal absorbed photon-to-current efficiency (APCE) is found to be nonconstant, following a specific dependence of the internal charge separation and extraction on the increasing thickness. This APCE variation with BiVO4 thickness is key for precise computational simulation of light propagation in BiVO4 based on the transfer matrix method...
March 11, 2024: ACS Applied Energy Materials
https://read.qxmd.com/read/38478710/advances-in-hierarchical-inorganic-nanostructures-for-efficient-solar-energy-harvesting-systems
#13
JOURNAL ARTICLE
Manjunatha C, Chandresh Kumar R, Manmadha Rao B, Girish Kumar S, Varun S, Kartik R, Gyanprakash Maurya, Karthik B, Swathi C, Mohtada Sadrzadeh, Ajit Khosla
The urgent need to address the global energy and environmental crisis necessitates the development of efficient solar-power harvesting systems. Among the promising candidates, hierarchical inorganic nanostructures stand out due to their exceptional attributes, including a high specific surface area, abundant active sites, and tunable optoelectronic properties. In this comprehensive review, we delve into the fundamental principles underlying various solar energy harvesting technologies, including dye-sensitized solar cells (DSSCs), photocatalytic, photoelectrocatalytic (water splitting), and photothermal (water purification) systems, providing a foundational understanding of their operation...
March 13, 2024: ChemSusChem
https://read.qxmd.com/read/38477695/dissolution-induced-surface-reconstruction-of-ni-0-95-pt-0-05-si-p-si-photocathode-for-efficient-photoelectrochemical-h-2-production
#14
JOURNAL ARTICLE
Haoyue Zhang, Shengyang Li, Jing Xu, Xianglie Sun, Jing Xia, Guangwei She, Jiacheng Yu, Changzhou Ru, Jun Luo, Xiangmin Meng, Lixuan Mu, Wensheng Shi
Metal silicide/Si photoelectrodes have demonstrated significant potential for application in photoelectrochemical (PEC) water splitting to produce H2 . To achieve an efficient and economical hydrogen evolution reaction (HER), a paramount consideration lies in attaining exceptional catalytic activity on the metal silicide surface with minimal use of noble metals. Here, this study presents the design and construction of a novel Ni0.95 Pt0.05 Si/p-Si photocathode. Dopant segregation is used to achieve a Schottky barrier height as high as 1...
March 13, 2024: Small
https://read.qxmd.com/read/38460173/concentrated-solar-light-photoelectrochemical-water-splitting-for-stable-and-high-yield-hydrogen-production
#15
JOURNAL ARTICLE
Wan Jae Dong, Zhengwei Ye, Songtao Tang, Ishtiaque Ahmed Navid, Yixin Xiao, Bingxing Zhang, Yuyang Pan, Zetian Mi
Photoelectrochemical water splitting is a promising technique for converting solar energy into low-cost and eco-friendly H2 fuel. However, the production rate of H2 is limited by the insufficient number of photogenerated charge carriers in the conventional photoelectrodes under 1 sun (100 mW cm-2 ) light. Concentrated solar light irradiation can overcome the issue of low yield, but it leads to a new challenge of stability because the accelerated reaction alters the surface chemical composition of photoelectrodes...
March 9, 2024: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://read.qxmd.com/read/38457286/recent-advances-in-redox-based-z-scheme-overall-water-splitting-under-visible-light-irradiation
#16
REVIEW
Yu Qi, Fuxiang Zhang
Photocatalytic overall water splitting (OWS) using suspended particulate photocatalysts to produce green hydrogen has inspired continuous interest due to its low cost for easy large-scale application. The two-step photoexcitation system (Z-scheme) mimicking natural photosynthesis was proposed to efficiently use visible light for realization of efficient conversion of solar irradiation. In this Perspective, we will introduce recent advances in redox-based Z-scheme OWS systems, including iodine-based, iron-based, metal complex-based, and other special ion redox couples...
March 8, 2024: Journal of Physical Chemistry Letters
https://read.qxmd.com/read/38456373/designing-atomic-interface-in-sb-2-s-3-cds-heterojunction-for-efficient-solar-water-splitting
#17
JOURNAL ARTICLE
Minji Yang, Zeyu Fan, Jinyan Du, Chao Feng, Ronghua Li, Beibei Zhang, Nadiia Pastukhova, Matjaz Valant, Matjaž Finšgar, Andraž Mavrič, Yanbo Li
In the emerging Sb2 S3 -based solar energy conversion devices, a CdS buffer layer prepared by chemical bath deposition is commonly used to improve the separation of photogenerated electron-hole pairs. However, the cation diffusion at the Sb2 S3 /CdS interface induces detrimental defects but is often overlooked. Designing a stable interface in the Sb2 S3 /CdS heterojunction is essential to achieve high solar energy conversion efficiency. As a proof of concept, this study reports that the modification of the Sb2 S3 /CdS heterojunction with an ultrathin Al2 O3 interlayer effectively suppresses the interfacial defects by preventing the diffusion of Cd2+ cations into the Sb2 S3 layer...
March 8, 2024: Small
https://read.qxmd.com/read/38449570/comparing-the-net-energy-balance-of-standalone-photovoltaic-coupled-electrolysis-and-photoelectrochemical-hydrogen-production
#18
JOURNAL ARTICLE
Brian Tam, Oytun Babacan, Andreas Kafizas, Jenny Nelson
Photovoltaic-coupled electrolysis (PV-E) and photoelectrochemical (PEC) water splitting are two options for storing solar energy as hydrogen. Understanding the requirements for achieving a positive energy balance over the lifetime of facilities using these technologies is important for ensuring sustainability. While neither technology has yet reached full commercialisation, they are also at very different technology readiness levels and scales of development. Here, we model the energy balance of standalone large-scale facilities to evaluate their energy return on energy invested (ERoEI) over time and energy payback time (EPBT)...
March 5, 2024: Energy & Environmental Science
https://read.qxmd.com/read/38445742/tailoring-photocatalytic-water-splitting-activity-of-boron-thiophene-polymer-through-pore-size-engineering
#19
JOURNAL ARTICLE
Preeti Bhauriyal, Thomas Heine
Taking into account the electron-rich and visible light response of thiophene, first-principles calculations have been carried out to explore the photocatalytic activity of donor-acceptor polymers incorporating thiophene and boron. Honeycomb-kagome boron-thiophene (BTP) polymers with varying numbers of thiophene units and fixed B center atoms are direct bandgap semiconductors with tunable bandgaps ranging from 2.41 to 1.88 eV and show high absorption coefficients under the ultraviolet and visible regions of the solar spectrum...
March 7, 2024: Journal of Chemical Physics
https://read.qxmd.com/read/38439739/novel-c-4-p-2-monolayers-forming-z-scheme-heterojunction-and-janus-structure-for-high-efficiency-metal-free-photocatalytic-water-splitting
#20
JOURNAL ARTICLE
Jiahe Lin, Bofeng Zhang
Metal-free two-dimensional (2D) semiconductors have garnered significant attention in the realm of photocatalytic water splitting, primarily owing to their inherent clean, stable, and efficient photoresponsive properties. Motivated by it, we have proposed two types of stable C4 P2 monolayers with indirect band gaps, mediocre carrier mobility and excellent optical absorption in visible-light and ultraviolet regions. Although the too-low work function of monolayer α-C4 P2 and the too-high work function of monolayer β-C4 P2 make them only suitable for single-side redox reaction in photocatalytic water splitting, the creation of an α-C4 P2 /β-C4 P2 Z-scheme heterojunction, combined with the Janus monolayer γ-C4 P2 that integrates features of both α and β structures, effectively addresses this limitation, fulfilling the prerequisites for comprehensive photocatalytic water splitting...
March 5, 2024: Physical Chemistry Chemical Physics: PCCP
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