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Insights into Electrocatalytic Nitrate Reduction to Ammonia via Cu-Based Bimetallic Catalysts
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-02-01 , DOI: 10.1021/acssuschemeng.2c06498 Jing Zhao 1 , Lijuan Liu 2 , Ya Yang 2 , Dan Liu 2 , Xiaobo Peng 2 , Shijing Liang 2 , Lilong Jiang 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-02-01 , DOI: 10.1021/acssuschemeng.2c06498 Jing Zhao 1 , Lijuan Liu 2 , Ya Yang 2 , Dan Liu 2 , Xiaobo Peng 2 , Shijing Liang 2 , Lilong Jiang 2
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Cu-based bimetallic catalysts have been studied in the electrocatalytic nitrate (NO3–) reduction reaction (NO3–RR) for a long time. However, few studies have focused on horizontal comparison of CuNi, CuCo, and CuFe (abbreviated as CuM) bimetallic catalysts in electrocatalytic NO3–RR for ammonia synthesis. Herein, we prepare the three series of Cu-based bimetallic catalysts, with different atom ratios of Cu/M (Cu/M = 7/3, 5/5, or 3/7) and ordered mesoporous carbon (OMC) as support (denoted as CuM/OMC). The characterization results reveal that the metallic particles of Cu and M components possess an intimate relationship on the CuM/OMC catalysts. The electrocatalytic NO3–RR performance uncovers that the optimal NH3 yield rates of CuM/OMC catalysts at −0.8 V (vs reversible hydrogen electrode (RHE)) follow this order: Cu5Fe5/OMC > Cu5Co5/OMC > Cu7Ni3/OMC > Cu/OMC > Fe/OMC > Co/OMC > Ni/OMC > OMC. The bimetallic CuM/OMC catalysts exhibit higher NH3 yield rates than the monometallic catalysts. This is attributed to strong synergistic effects between the Cu and M components. We expect that these insights can stimulate new developments of bimetallic catalysts in electrocatalysis.
中文翻译：
通过铜基双金属催化剂电催化硝酸盐还原氨的见解
Cu基双金属催化剂在电催化硝酸盐（NO 3 -）还原反应（NO 3 - RR）中的研究已有很长时间。然而，很少有研究关注 CuNi、CuCo 和 CuFe（缩写为 CuM）双金属催化剂在电催化 NO 3 – RR 合成氨中的横向比较。在此，我们制备了三个系列的 Cu 基双金属催化剂，具有不同的 Cu/M 原子比（Cu/M = 7/3、5/5 或 3/7），并以有序介孔碳（OMC）为载体（表示为 CuM/OMC)。表征结果表明，Cu 和 M 组分的金属颗粒与 CuM/OMC 催化剂具有密切的关系。电催化NO 3 –RR 性能揭示了CuM/OMC 催化剂在 −0.8 V（相对于可逆氢电极 (RHE)）的最佳 NH 3产率遵循以下顺序：Cu 5 Fe 5 /OMC > Cu 5 Co 5 /OMC > Cu 7 Ni 3 /OMC > Cu/OMC > Fe/OMC > Co/OMC > Ni/OMC > OMC。双金属CuM/OMC催化剂表现出比单金属催化剂更高的NH 3产率。这归因于 Cu 和 M 组分之间的强协同作用。我们期望这些见解能够刺激双金属催化剂在电催化领域的新发展。
更新日期：2023-02-01
中文翻译：
通过铜基双金属催化剂电催化硝酸盐还原氨的见解
Cu基双金属催化剂在电催化硝酸盐（NO 3 -）还原反应（NO 3 - RR）中的研究已有很长时间。然而，很少有研究关注 CuNi、CuCo 和 CuFe（缩写为 CuM）双金属催化剂在电催化 NO 3 – RR 合成氨中的横向比较。在此，我们制备了三个系列的 Cu 基双金属催化剂，具有不同的 Cu/M 原子比（Cu/M = 7/3、5/5 或 3/7），并以有序介孔碳（OMC）为载体（表示为 CuM/OMC)。表征结果表明，Cu 和 M 组分的金属颗粒与 CuM/OMC 催化剂具有密切的关系。电催化NO 3 –RR 性能揭示了CuM/OMC 催化剂在 −0.8 V（相对于可逆氢电极 (RHE)）的最佳 NH 3产率遵循以下顺序：Cu 5 Fe 5 /OMC > Cu 5 Co 5 /OMC > Cu 7 Ni 3 /OMC > Cu/OMC > Fe/OMC > Co/OMC > Ni/OMC > OMC。双金属CuM/OMC催化剂表现出比单金属催化剂更高的NH 3产率。这归因于 Cu 和 M 组分之间的强协同作用。我们期望这些见解能够刺激双金属催化剂在电催化领域的新发展。
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