氮、硫共掺杂碳包覆硫化锌用于高效电合成过氧化氢

Nitrogen, sulfur co-doped carbon coated zinc sulfide for efficient hydrogen peroxide electrosynthesis.

作者信息

Dai Chengxiang, Li Rongrong, Guo Haichuan, Liang Shuqin, Shen Hangjia, Thomas Tiju, Yang Minghui

机构信息

Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, 315201, China.

Department of Metallurgical and Materials Engineering and the DST Solar Energy Harnessing Center, Indian Institute of Technology Madras, Chennai 600036, India.

出版信息

Dalton Trans. 2021 Apr 28;50(16):5416-5419. doi: 10.1039/d0dt04348f.

DOI:10.1039/d0dt04348f

PMID:33908950

Abstract

Oxygen electroreduction (ORR) via a two-electron pathway is a promising alternative for hydrogen peroxide (H2O2) synthesis in small-scale applications. In this work, nitrogen and sulfur co-doped carbon coated zinc sulfide nanoparticles (ZnS@C) are synthesized using facile high-temperature annealing. In an alkaline electrolyte, the presence of ZnS suppresses the reduction of H2O2 during the ORR and contributes to high H2O2 selectivity (∼90%) over a wide potential range (0.40-0.80 V). Continuous generation of H2O2 is in turn achieved at an outstanding rate of 1.485 mol gcat.-1 h-1 with a faradaic efficiency of 93.7%.

摘要

通过双电子途径的氧电还原（ORR）是小规模应用中合成过氧化氢（H2O2）的一种有前景的替代方法。在这项工作中，采用简便的高温退火法合成了氮和硫共掺杂碳包覆硫化锌纳米颗粒（ZnS@C）。在碱性电解质中，ZnS的存在抑制了ORR过程中H2O2的还原，并在较宽的电位范围（0.40 - 0.80 V）内有助于实现高H2O2选择性（约90%）。反过来，以1.485 mol gcat.-1 h-1的优异速率和93.7%的法拉第效率实现了H2O2的连续生成。