Fe2O3 hierarchical tubular structure decorated with cobalt phosphide (CoP) nanoparticles for efficient photoelectrochemical water splitting

被引：53

作者：

Nguyen Duc Quang ^{[1
]}

Hu, Weiguang ^{[2
]}

Chang, Hyo Sik ^{[2
]}

Phuoc Cao Van ^{[1
]}

Duc Duong Viet ^{[1
]}

Jeong, Jong-Ryul ^{[1
]}

Seo, Dong-Bum ^{[1
]}

Kim, Eui-Tae ^{[1
]}

Kim, Chunjoong ^{[1
]}

Kim, Dojin ^{[1
]}

机构：

[1] Chungnam Natl Univ, Dept Mat Sci & Engn, Daejeon 34134, South Korea

[2] Chungnam Natl Univ, Grad Sch Energy Sci & Technol, Daejeon 34134, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2021年 / 417卷

基金：

新加坡国家研究基金会;

关键词：

SnO2:Fe2O3; CoP; Hierarchical tubular structure; Photoelectrochemical; Water oxidation; ALPHA-FE2O3; PHOTOANODE; NANORODS; ENERGY; CELL; ELECTROCATALYST; NANOSTRUCTURES; OXIDATION;

D O I：

10.1016/j.cej.2021.129278

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Severe charge recombination and poor water oxidation kinetics limit the performance of hematite-based (Fe2O3) photoanodes far from their theoretical levels and restrict their applicability for photoelectrochemical (PEC) water splitting devices. In this study, a hierarchical tubular structure (HTS) CoP/SnO2:Fe2O3 with a large surface area and well-defined crystalline structures was fabricated via a facile template-engaged redox etching method. The SnO2 nano-layer served as a dopant source to improve the bulk charge carrier transport efficiency along the Fe2O3 HTS growth axis; therefore, the achieved photocurrent could be up to 2.0 mA cm(-2) at 1.23 V-RHE (V vs. reversible hydrogen electrode). The CoP nanoparticles (NPs) were introduced as a high-speed hole collector from the light-absorber layer as well as a catalyst to enhance charge carrier injection efficiency on the photoelectrode surface. As a result, CoP/SnO2:Fe2O3 shows the highest photocurrent density of 3.50 mA cm(-2) (at 1.23 V-RHE) with a negative shift in the onset potential of 180 mV.

引用

页数：8

共 51 条

[1] Boron Doping of Metal-Doped Hematite for Reduced Surface Recombination in Water Splitting [J].