Jung, Wonsang Jeong, Jaewoo Chae, Younghyun Lee, Woong Hee Ko, Young-Jin Chae, Keun Hwa Oh, Hyung-suk Lee, Ung Lee, Dong Ki Min, Byoung Koun Shin, Hyeyoung Hwang, Yun Jeong Won, Da Hye 2024-01-19T11:00:20Z 2024-01-19T11:00:20Z 2022-11-10 2022-11 2050-7488 https://pubs.kist.re.kr/handle/201004/114408 The electrochemical nitrate reduction reaction (eNO(3)RRs) can produce value-added chemicals such as ammonia (NH3) via multiple steps. Here, we demonstrate that bimetallic Cu-Pd-O-x alloy electrocatalysts can promote selective NH3 production from the eNO(3)RR, especially at low overpotential, by accelerating the rate-determining hydrogenation of NO2-, a critical intermediate, on the Cu catalyst. The synergistic effect of Cu and Pd affords 14 times higher NH3 yield (1.41 mg h(-1) cm(-2)) at -0.2 V-RHE with an optimum composition (Cu0.65Pd0.35Ox) than that obtained using bare CuOx. The operando near edge X-ray absorption fine structure (NEXAFS) and simulation results support that the high hydrogen affinity of Pd facilitates sequential hydrogenation on metallic Cu active sites, consequently increasing the NH3 selectivity and production rate. Our study sheds light on the mechanism of the catalytic eNO(3)RR and presents a design strategy for more advanced eNO(3)RR electrocatalysts. English Royal Society of Chemistry Synergistic bimetallic CuPd oxide alloy electrocatalyst for ammonia production from the electrochemical nitrate reaction Article 10.1039/d2ta06316f 1 Journal of Materials Chemistry A, v.44, pp.23397 - 23942 Journal of Materials Chemistry A 44 23397 23942 N scie scopus 000874054700001 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article; Early Access CARBON WATER REDUCTION DENITRIFICATION PERSPECTIVES