| Enhancement of charge separation and hole utilization in a Ni2P2O7-Nd-BiVO4 photoanode for efficient photoelectrochemical water oxidation | |
Tian, Kaige1; Wu, Lan1; Chai, Huan2; Gao, Lili2; Wang, Meng1; Niu, Huilin2; Chen, Li1; Jin, J(靳军)2 | |
| 2023-08-15 | |
| Source Publication | JOURNAL OF COLLOID AND INTERFACE SCIENCE Impact Factor & Quartile |
| ISSN | 0021-9797 |
| Volume | 644Pages:124-133 |
| Abstract | It is necessary for photoelectrochemical (PEC) water splitting to reduce the electron-hole recombination rate and enhance the water oxidation reaction kinetics. Here, we prepared Ni2P2O7-Nd-BiVO4 composite photoanodes by coupling Ni2P2O7 co-catalysts to neodymium (Nd)-doped BiVO4 surfaces through photo-assisted electrodeposition. The Ni2P2O7-Nd-BiVO4 photoanode exhibits a high photocurrent density of 3.6 mA cm−2 at 1.23 V vs reversible hydrogen electrode (RHE), which is three times higher than that of the bare BiVO4 (1.2 mA cm−2). Detailed characterizations demonstrate that Nd doping reduces the band gap, significantly increases the carrier density and effectively reduces the charge transfer resistance. More importantly, the Ni2P2O7 co-catalyst has multiple roles. Specifically, it can act as a hole extraction layer to accelerate hole migration and inhibit hole-electron recombination. At the same time, it significantly improves the water oxidation reaction kinetics. In addition, it also provides more water oxidation active sites. This work provides ideas for the design and study of efficient BiVO4-based photoanodes. © 2023 Elsevier Inc. |
| Keyword | Association reactions Catalysts Charge transfer Electrodes Energy gap Neodymium compounds Nickel compounds Oxidation Reaction kinetics Vanadium compounds Charge-separation Co catalysts Electron hole recombination rate Neodymium doping Ni2P2O7 co-catalyst Oxidation reactions Photo-anodes Photoelectrochemical water oxidation Photoelectrochemical water splitting |
| Publisher | Academic Press Inc. |
| DOI | 10.1016/j.jcis.2023.04.064 |
| Indexed By | EI |
| Language | 英语 |
| EI Accession Number | 20231714005940 |
| EI Keywords | Bismuth compounds |
| EI Classification Number | 802.2 Chemical Reactions ; 803 Chemical Agents and Basic Industrial Chemicals ; 804 Chemical Products Generally |
| Original Document Type | Journal article (JA) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lzu.edu.cn/handle/262010/500469 |
| Collection | 化学化工学院 |
| Corresponding Author | Wu, Lan |
| Affiliation | 1.College of Chemical Engineering, Northwest Minzu University, Gansu, Lanzhou; 730030, China; 2.State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Gansu, Lanzhou; 730000, China |
| Recommended Citation GB/T 7714 | Tian, Kaige,Wu, Lan,Chai, Huan,et al. Enhancement of charge separation and hole utilization in a Ni2P2O7-Nd-BiVO4 photoanode for efficient photoelectrochemical water oxidation[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2023,644:124-133. |
| APA | Tian, Kaige.,Wu, Lan.,Chai, Huan.,Gao, Lili.,Wang, Meng.,...&Jin, Jun.(2023).Enhancement of charge separation and hole utilization in a Ni2P2O7-Nd-BiVO4 photoanode for efficient photoelectrochemical water oxidation.JOURNAL OF COLLOID AND INTERFACE SCIENCE,644,124-133. |
| MLA | Tian, Kaige,et al."Enhancement of charge separation and hole utilization in a Ni2P2O7-Nd-BiVO4 photoanode for efficient photoelectrochemical water oxidation".JOURNAL OF COLLOID AND INTERFACE SCIENCE 644(2023):124-133. |
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