H2O2 production on a carbon cathode loaded with a nickel carbonate catalyst and on an oxide photoanode without an external bias

被引：2

作者：

Takasugi, Soichi ^{[1
]}

Miseki, Yugo ^{[1
]}

Konishi, Yoshinari ^{[1
]}

Sasaki, Kotaro ^{[2
]}

Fujita, Etsuko ^{[2
]}

Sayama, Kazuhiro ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Global Zero Emiss Res Ctr GZR, Cent 5,1-1-1 Higashi, Tsukuba, Ibaraki 3058565, Japan

[2] Brookhaven Natl Lab, Chem Div, Upton, NY 11973 USA

来源：

RSC ADVANCES | 2021年 / 11卷 / 19期

关键词：

HYDROGEN-PEROXIDE PRODUCTION; OXYGEN REDUCTION; ELECTROCHEMICAL GENERATION; EFFICIENT ELECTROCATALYST; WO3/BIVO4; PHOTOANODE; WATER; O-2; ELECTROSYNTHESIS; PALLADIUM; GRAPHITE;

D O I：

10.1039/d1ra01045j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Efficient H<INF>2</INF>O<INF>2</INF> production both on a carbon cathode modified with various metal salts and on an oxide photoanode was investigated. The cathodic current density and faradaic efficiency for H<INF>2</INF>O<INF>2</INF> production (FE(H<INF>2</INF>O<INF>2</INF>)) on a carbon cathode in KHCO<INF>3</INF> aqueous solution were significantly improved by the loading of an insoluble nickel carbonate basic hydrate catalyst. This electrode was prepared by a precipitation method of nickel nitrate and KHCO<INF>3</INF> aqueous solution at ambient temperature. The nickel carbonate basic hydrate electrode was very stable, and the accumulated concentration of H<INF>2</INF>O<INF>2</INF> was reached at 1.0 wt% at a passed charge of 2500C (the average FE(H<INF>2</INF>O<INF>2</INF>) was 80%). A simple photoelectrochemical system for H<INF>2</INF>O<INF>2</INF> production from both the cathode and a BiVO<INF>4</INF>/WO<INF>3</INF> photoanode was demonstrated without an external bias or an ion-exchange membrane in a one-compartment reactor under simulated solar light. The apparent FE(H<INF>2</INF>O<INF>2</INF>) from both electrodes was calculated to be 168% in total, and the production rate of H<INF>2</INF>O<INF>2</INF> was approximately 0.92 mu mol min-1 cm-2. The solar-to-chemical energy conversion efficiency for H<INF>2</INF>O<INF>2</INF> production (STC<INF>H<INF>2</INF>O<INF>2</INF></INF>) without an external bias was approximately 1.75%.

引用

页码：11224 / 11232

页数：9

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