文献类型：期刊文献

英文题名：Mo anchor as promoter to initiate selective catalytic ammonia oxidation to nitrogen at 40?℃

作者：Zhang, Yiyang[1]; Lin, Jialong[1]; Wang, Haifeng[2]; Yamaguchi, Kazuya[3]; Ishida, Tamao[4]; Zhang, Jie[5]; Xiu, Guangli[1]; Murayama, Toru[2]; Lin, Mingyue[1,6]

机构：[1] State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Institute for Catalysis, Hokkaido University, N21W10, Kita-ku, Hokkaido, Sapporo, 001-0021, Japan; [3] Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo, 113-8656, Japan; [4] Research Center for Artificial Photosynthesis [ReCAP], Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558?8585, Japan; [5] School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China; [6] Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China

年份：2025

卷号：460

外文期刊名：Catalysis Today

收录：EI(收录号：20253018839466)

语种：英文

外文关键词：Ammonia - Catalysts - Catalytic oxidation - Chromium compounds - Molybdenum - Molybdenum oxide - Oxides - Temperature

摘要：The selective catalytic oxidation of ammonia (NH3-SCO) at low temperatures suffers from slow activation and poor N2 selectivity. Herein, we demonstrate a Mo-doped cryptomelane-type MnO2 (OMS-2) catalyst that enables highly selective NH3 conversion at 40 °C. By introducing Mo into OMS-2, the catalyst exhibits an increased Mn3 + content and a lower Mn4+/Mn3+ ratio, as confirmed by XPS and H2-TPR. DFT calculations reveal that Mo doping enhances the adsorption energy of *NH+ *O intermediates, which is key to N-N coupling. This intermediate stabilization provides a mechanistic basis for promoting N2 formation under mild conditions, rather than through conventional high-temperature routes. Our findings highlight a low-temperature NH3-SCO strategy based on redox-flexible manganese oxides and provide mechanistic insight into how Mo modification enables high activity beyond conventional temperature constraints. ? 2025 Elsevier B.V.