电催化剂
电合成
重新使用
流出物
废水
工业废水处理
催化作用
污水处理
环境科学
工艺工程
计算机科学
化学
废物管理
环境工程
工程类
电化学
电极
有机化学
物理化学
作者
David J. Kim,Qianhong Zhu,Kali Rigby,Xuanhao Wu,Jin Hyun Kim,Jae Hong Kim
标识
DOI:10.1021/acs.est.1c06850
摘要
Electrocatalysis has been proposed as a versatile technology for wastewater treatment and reuse. While enormous attention has been centered on material synthesis and design, the practicality of such catalyst materials remains clouded by a lack of both stability assessment protocols and understanding of deactivation mechanisms. In this study, we develop a protocol to identify the wastewater constituents most detrimental to electrocatalyst performance in a timely manner and elucidate the underlying phenomena behind these losses. Synthesized catalysts are electrochemically investigated in various electrolytes based on real industrial effluent characteristics and methodically subjected to a sequence of chronopotentiometric stability tests, in which each stage presents harsher operating conditions. To showcase, oxidized carbon black is chosen as a model catalyst for the electrosynthesis of H2O2, a precursor for advanced oxidation processes. Results illustrate severe losses in catalyst activity and/or selectivity upon the introduction of metal pollutants, namely magnesium and zinc. The insights garnered from this protocol serve to translate lab-scale electrocatalyst developments into practical technologies for industrial water treatment purposes.
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