Oxygen-Vacancy-Rich Cu2O Hollow Nanocubes for Nitrate Electroreduction Reaction to Ammonia in a Neutral Electrolyte

作者：Xiaohui Wang, Zhengmin Wang, Qing‐Ling Hong, Ze‐Nong Zhang, Feng Shi, Dong‐Sheng Li, Shu-Ni Li, Yu Chen · 发表于：Inorganic Chemistry · 年份：2022 · DOI：10.1021/acs.inorgchem.2c02716 · 被引用次数：40 · 研究领域：Ammonia Synthesis and Nitrogen Reduction、Caching and Content Delivery、Advanced Photocatalysis Techniques

The electrocatalytic nitrate reduction reaction (NO 3 – -ERR) to ammonia (NH 3 ) is a promising strategy for NH 3 production. Cu-based nanomaterials have been regarded as a kind of effective NO 3 – -ERR catalysts. In this work, high-quality hollow Cu 2 O nanocubes (Cu 2 O h-NCs) are facilely synthesized by a simple one-step reduction method. The as-prepared Cu 2 O h-NCs reveal high selectivity and activity for NO 3 – -ERR, which is ascribed to abundant oxygen vacancies, high surface area, hollow architecture, low mass transfer resistance, and strong adsorbing ability toward NO 3 – . In fact, Cu 2 O h-NCs can achieve a Faradic efficiency of 92.9% and an NH 3 yield of 56.2 mg h –1 mg cat –1 for NH 3 production at −0.85 V ( vs RHE) potential, which exceeds those of other transition-metal-based NO 3 – -ERR electrocatalysts.