APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Qun-Zeng Huang,Ze-Juan Tao,Li-Qun Ye,Hong-Chang Yao,Zhong-Jun Li
Development of highly efficient and low-cost noble metal-free co-catalysts for photocatalytic H 2 evolution from water splitting has been aiming at a long-term goal of a renewable hydrogen economy. Herein, a series of novel Mn 0.2 Cd 0.8 S/CoP 3 composites have been successfully prepared through loading CoP 3 nanoparticles on the surface of one dimensional (1D) Mn 0.2 Cd 0.8 S nanowires (NWs) by a facile solvothermal method. Under visible light (λ ≥ 420 nm) irradiation, the as-prepared Mn 0.2 Cd 0.8 S/CoP 3 composite with 2.87 wt% of CoP 3 displayed the highest photocatalytic H 2 evolution activity with a corresponding H 2 evolution rate of 29.53 mmol g −1 h −1 and an apparent quantum yield of 29.2% at 420 nm, which was about 5.02 times higher than that of pure Mn 0.2 Cd 0.8 S and 1.79 times than that of Mn 0.2 Cd 0.8 S/Pt-1.5 wt%. Moreover, the Mn 0.2 Cd 0.8 S/CoP 3 composite exhibited excellent photostability. The superior photocatalytic activity of Mn 0.2 Cd 0.8 S/CoP 3 composite was predominantly attributed to the synergistic effects of highly efficient charge separation efficiency and sufficient active sites for H 2 evolution reaction. This work revealed that low-cost CoP 3 can replace noble metal Pt as a highly efficient co-catalyst for enhancing the photocatalytic activity of semiconductor materials.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Junyu Zhang,Yan Liu,Jiupeng Zhang,Yu Zhang,Shisheng Yuan,Deguo Wang,Jianshe Lian,Qing Jiang,Guoyong Wang
The current bottleneck that clean energy cannot be fully utilized is that grid-level energy storage technology is still expensive. To become the energy storage link for clean energy usage, it is necessary to find electrodes with low cost and high energy conversion efficiency for hydrogen production by water splitting. In this article, we provide a strategy to make an electrode with the excellent catalyst of amorphous and porous CoP 3 , which is shaped into hollow needles. The porous structure fully exposes the active sites, amorphization modulates the electronic environment and accelerates the gas desorption process. The geometric gradient of the electrode's needle shape leads to Laplace force acting on the catalytic process: gas attached on the surface can be driven to coalesce and detach due to the conversion of excess surface energy into kinetic energy. The general consideration about dehydrogenation overpotential and degassing overpotential makes our final electrodes as both anode and cathode of overall water-splitting device exhibit an excellent catalytic performance with a partial current density over 1 A cm −2 , even better than the asymmetrical precious metals benchmark Pt/C || RuO 2 pair.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
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IF 4.084
Zhuojun Duan,Mingyu Pi,Dingke Zhang,Peng Zhang,Junkai Deng,Shijian Chen
To promote hydrogen production through water splitting, novel porous 3D Al doped CoP 3 nanowire arrays on carbon fiber paper are successfully fabricated as an effective self-supported electrode for hydrogen evolution reaction . The results indicate that the electrocatalytic performance of CoP 3 can be dramatically enhanced via Al doping. It only needs an overpotential of only 40 mV to achieve the current density of 10 mA cm −2 with a small Tafel slop of 43 mV dec −1 for the Al (10%)-CoP 3 nanowire arrays. Moreover, the Al (10%)-CoP 3 NAs/CFP exhibit superior HER efficiency to Pt/C film at high overpotentials due to prompt release of hydrogen bubbles on the special nanowire arrays surfaces. This study demonstrates an avenue for further improving the electrocatalytic activity via tuning the electronic structures and adjusting the surface morphologies through heteroatoms doping.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Xianyu Chu,Yanan Wang,Li Jing,Wei Jiang,Yuanyuan Wu,Ming Lu,Bo Liu,Chunbo Liu,Yantao Sun,Guangbo Che
Constructing heterostructures to regulate the electronic structure is an effective strategy for enhancing the oxygen evolution reaction (OER) electrocatalytic activity. Herein, we prepared heterostructured Co 4 S 3 /CoP 3 (CoPS/NFF) electrocatalysts through a one-step phosphorization and sulfuration process. The synthesized electrode drives an overpotential of 190, 272, and 331 mV at 20, 50, and 100 mA cm −2 for OER in 1 M KOH alkaline media, respectively. These values outperformed those of monophase Co 4 S 3 and CoP 3 as well as the majority of transition metal-based catalysts previously reported. Furthermore, the Density Functional Theory (DFT) calculation results show that charge redistribution occurs at CoPS/NFF heterogeneous interfaces, which facilitates charge transfer and improves catalytic activity. The CoPS/NFF with heterostructure optimizes the adsorption strength of oxygen-containing intermediates (*O, *OH, and *OOH) by appropriately adjusting the d-band center energy level, thereby reducing the energy barrier of OER. This work provides a new perspective on rational design strategies for efficient transition metal-based electrocatalysts by inducing d-band center regulation through the construction of heterostructures.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Lei Lin,Qiang Fu,Yaping Han,Jianing Wang,Xingquan Zhang,Yaohui Zhang,Chang Hu,Zhiguo Liu,Yu Sui,Xianjie Wang
Non-noble-metal catalysts are the key point for the development of water splitting to produce hydrogen, a process which can be used to overcome the energy crisis. In this paper, we investigated water splitting in alkaline environments using skutterudite-type cobalt phosphide (CoP 3 ) nanoneedle arrays fabricated on carbon cloth. A moderate amount of iron is doped into pristine CoP 3 , and the resulting Co 1− x Fe x P 3 shows a significant enhancement for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) compared with the pristine CoP 3 . Co 0.7 Fe 0.3 P 3 displays the best HER performance, with an overpotential of 167 mV vs. reversible hydrogen electrode (RHE) to reach a current density of 10 mA cm −2 ( η 10 ) and a Tafel slope of 65.1 mV dec −1 . Co 0.7 Fe 0.3 P 3 also shows the best OER catalytic performance, reaching a current density of 50 mA cm −2 ( η 50 ) at an overpotential of 330 mV vs. RHE. Our results indicate that simple second metal element doping is an effective way to improve the HER and OER performance of skutterudite-type electrocatalysts in alkaline media.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 6
·1595
·
IF 5.076
Jing Qi,Tianli Wu,Mengyao Xu,Dan Zhou,Zhubing Xiao
To address the challenge of highly efficient water splitting into H2, successful fabrication of novel porous three-dimensional Ni-doped CoP3nanowall arrays on carbon cloth was realized, resulting in an effective self-supported electrode for the electrocatalytic hydrogen-evolution reaction. The synthesized samples exhibit rough, curly, and porous structures, which are beneficial for gaseous transfer and diffusion during the electrocatalytic process. As expected, the obtained Ni-doped CoP3nanowall arrays with a doping concentration of 7% exhibit the promoted electrocatalytic activity. The achieved overpotentials of 176 mV for the hydrogen-evolution reaction afford a current density of 100 mA cm−2, which indicates that electrocatalytic performance can be dramatically enhanced via Ni doping. The Ni-doped CoP3electrocatalysts with increasing catalytic activity should have significant potential in the field of water splitting into H2. This study also opens an avenue for further enhancement of electrocatalytic performance through tuning of electronic structure andd-band center by doping.Keywords:transition-metal phosphide;electrocatalyst;hydrogen-evolution reaction;density-functional theory
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Tingting Jiang,Siyu Huang,Yu Wang,Guanbo Wang,Wei Wang,Haifeng Zhang
Persulft-based advanced oxidation processes (PS-AOPs) are an efficient strategy to degrade refractory pollutants. Fabricating a highly efficient catalyst is the most pivotal factor in PS activation. This study designs a novel CoP 3 -anchored layered Bi 2 O 2 S through an interface engineering strategy, where the unique electronic structure and surface properties of Bi 2 O 2 S lead to dramatically reduced cobalt ion leaching compared with that of CoP 3 . It exhibited outstanding catalytic activity and achieved nearly complete removal (>99%) of 50 mg L −1 2,4-Dichlorophenol (2,4-DCP) within 30 min. Radical quenching experiments, EPR technique, electrochemical tests, and HPLC validated the coexistence of radical (•OH, SO 4 •− ) and non-radical ( 1 O 2 , electron transfer, high-valent metal species) pathways in the Light/Bi 2 O 2 S/CoP 3 /PMS system for 2,4-DCP degradation. Importantly, Bi 2 O 2 S/CoP 3 induced a pronounced photothermal effect that enhanced 2,4-DCP degradation efficiency. Furthermore, the attack sites of 2,4-DCP were precisely identified based on the Fukui index. Based on density functional theory calculation and high-performance liquid chromatography-mass spectrometry, the detailed degradation pathways were proposed. The toxicity of 2,4-DCP and its intermediate products were predicted by using the toxicity assessment software tool. Moreover, excellent reusability, real-water treatment efficacy (verified by 3D-EEM), high-efficiency removal of multiple pollutants, and wide pH adaptability (3−11) confirm practical potential for sewage treatment. This study provides insight into designing a highly efficient and green catalyst for simultaneous pollutant treatment.
研究领域:
环境催化
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材料科学
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水处理技术
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高级氧化过程
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纳米材料
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理论化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）