Zhang Meng, Liu Yang, Duan Yun, Liu Xu, Wang Yan-Qin
Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, College of Chemistry and Chemical Engineering, Inner Mongolia University, 24 Zhaojun Road, Hohhot 010021, PR China.
Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, College of Chemistry and Chemical Engineering, Inner Mongolia University, 24 Zhaojun Road, Hohhot 010021, PR China.
J Colloid Interface Sci. 2024 Oct;671:258-269. doi: 10.1016/j.jcis.2024.05.189. Epub 2024 May 25.
The electrocatalytic nitrate reduction to ammonia reaction (ENORR) holds great potential as a cost-effective method for synthesizing ammonia. This work designed a cerium (Ce) doped CuO/CuVO catalyst. The coupling of vanadium-based oxides with CuO effectively adjusts the catalyst's electronic structure, addressing the inherent issues of limited activity and low conductivity in typical copper-based oxides; moreover, Ce doping generates oxygen vacancies (O), providing more active sites and thereby enhancing the ENORR performance. The catalyst exhibits superior NHFaradaic efficiency (93.7 %) with a NH yield of 18.905 mg h cmat -0.5 V vs. RHE under alkaline conditions. This study provides guidance for the design of highly efficient catalysts for ENORR.
电催化硝酸盐还原制氨反应（ENORR）作为一种具有成本效益的合成氨方法具有巨大潜力。这项工作设计了一种铈（Ce）掺杂的CuO/CuVO催化剂。钒基氧化物与CuO的耦合有效地调整了催化剂的电子结构，解决了典型铜基氧化物中活性有限和导电性低的固有问题；此外，Ce掺杂产生氧空位（O），提供了更多活性位点，从而提高了ENORR性能。在碱性条件下，相对于可逆氢电极（RHE），该催化剂在-0.5 V时表现出优异的NH法拉第效率（93.7%），NH产率为18.905 mg h cm-2。该研究为ENORR高效催化剂的设计提供了指导。
