材料科学
钒酸铋
分解水
铋
钒酸盐
光电子学
化学工程
纳米技术
光催化
冶金
催化作用
生物化学
化学
工程类
作者
Kaige Tian,Lujie Jin,Asif Mahmood,Hua Yang,Pengfei An,Jing Zhang,Yujin Ji,Youyong Li,Li Deng,Junqing Yan,Junqing Yan
标识
DOI:10.1002/adfm.202410548
摘要
Abstract The poor carrier separation capability and sluggish water oxidation reaction kinetics are two critical factors that impact the photoelectrochemical (PEC) water splitting performance of the bismuth vanadate (BiVO 4 ) photoanode. Previous studies have demonstrated that doping with rare‐earth elements to induce lattice distortions and loading oxygen evolution reaction (OER) co‐catalysts are effective strategies for enhancing carrier separation capabilities and accelerating the kinetics of the water oxidation reaction. Herein, Cu 2+ ‐doped RuO 2 (Cu‐RuO 2 ) particles are anchored onto rare earth element Thulium (Tm)‐doped BiVO 4 (Tm‐BiVO 4 ) photoanode substrates, constructing an integrated Cu‐RuO 2 ‐Tm‐BiVO 4 photoanode. The newly integrated photoanode not only achieves a photocurrent density of 5.3 mA cm −2 at 1.23 V versus a reversible hydrogen electrode (vs RHE), but also exhibits exceptional stability. A series of detailed physical and chemical characterizations as well as density‐functional theory (DFT) calculations demonstrate that Tm doping induces lattice distortion in BiVO 4 , enhancing the internal electric field and thereby facilitating carrier separation. Moreover, the anchored Cu‐RuO 2 particles not only lattice‐match with the Tm‐BiVO 4 photoanode, reducing interfacial transfer resistance, but also expedite the kinetics of the water oxidation reaction. The profound significance of this work is that it offers a reference for the future design and fabrication of novel integrated photoanodes.
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