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Covalent Metalloporphyrin Polymer Coated on Carbon Nanotubes as Bifunctional Electrocatalysts for Water Splitting
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2022-06-23 , DOI: 10.1021/acs.inorgchem.2c01415 Yujia Wang 1 , Dengmeng Song 1 , Jun Li 1 , Qing Shi 1 , Jiale Zhao 1 , Yanping Hu 1 , Fanlong Zeng 1 , Ning Wang 1, 2
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2022-06-23 , DOI: 10.1021/acs.inorgchem.2c01415 Yujia Wang 1 , Dengmeng Song 1 , Jun Li 1 , Qing Shi 1 , Jiale Zhao 1 , Yanping Hu 1 , Fanlong Zeng 1 , Ning Wang 1, 2
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Metalloporphyrins have exhibited excellent electrocatalytic activities for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). In order to improve the efficiency and conductivity, these molecular catalysts need to be immobilized on conductive electrode materials. Herein, a facile “one-pot” strategy was developed to coat a covalent metalloporphyrin polymer on a carbon nanotube (CNT) as bifunctional catalysts [denoted as MTIPP@CNTs, H2TIPP = 5,10,15,20-tetra(4-(imidazole-1-yl)phenyl)porphyrin)] for water splitting in alkaline solution. MTIPP@CNTs have shown excellent electrocatalytic activities for both the HER and OER when metalloporphyrin’s central metal is optimized as well as the amount of catalysts that is loaded on the CNT. The overpotential (η10) of NiTIPP@CNT-2 for the OER is only 320 mV at a current density of 10 mA cm–2 in 1.0 M KOH, and CoTIPP@CNT-1 exhibited an excellent electrocatalytic activity for the HER (η10 = 450 mV for 10 mA cm–2). Furthermore, the remarkable bifunctional electrocatalytic performance (a cell voltage of 2.04 V with a current density of 10 mA cm–2) was also explored in the overall water splitting test.
中文翻译：
共价金属卟啉聚合物包覆在碳纳米管上作为水分解的双功能电催化剂
金属卟啉对析氢反应（HER）和析氧反应（OER）表现出优异的电催化活性。为了提高效率和导电性，需要将这些分子催化剂固定在导电电极材料上。在此，开发了一种简便的“一锅法”策略，将共价金属卟啉聚合物涂覆在碳纳米管 (CNT) 上作为双功能催化剂 [表示为 MTIPP@CNTs，H 2 TIPP = 5,10,15,20-tetra(4 -(imidazole-1-yl)phenyl)porphyrin)] 用于在碱性溶液中分解水。当优化金属卟啉的中心金属以及负载在 CNT 上的催化剂量时，MTIPP@CNTs 对 HER 和 OER 均表现出优异的电催化活性。过电位 (η 10) NiTIPP@CNT-2 在 1.0 M KOH 中的 OER 电流密度为 10 mA cm -2时仅为 320 mV ，而 CoTIPP@CNT-1 对 HER 表现出优异的电催化活性 (η 10 = 450 mV for 10 毫安厘米–2 )。此外，在整体水分解测试中还探索了显着的双功能电催化性能（电池电压为 2.04 V，电流密度为 10 mA cm -2 ）。
更新日期：2022-06-23
中文翻译：
共价金属卟啉聚合物包覆在碳纳米管上作为水分解的双功能电催化剂
金属卟啉对析氢反应（HER）和析氧反应（OER）表现出优异的电催化活性。为了提高效率和导电性，需要将这些分子催化剂固定在导电电极材料上。在此，开发了一种简便的“一锅法”策略，将共价金属卟啉聚合物涂覆在碳纳米管 (CNT) 上作为双功能催化剂 [表示为 MTIPP@CNTs，H 2 TIPP = 5,10,15,20-tetra(4 -(imidazole-1-yl)phenyl)porphyrin)] 用于在碱性溶液中分解水。当优化金属卟啉的中心金属以及负载在 CNT 上的催化剂量时，MTIPP@CNTs 对 HER 和 OER 均表现出优异的电催化活性。过电位 (η 10) NiTIPP@CNT-2 在 1.0 M KOH 中的 OER 电流密度为 10 mA cm -2时仅为 320 mV ，而 CoTIPP@CNT-1 对 HER 表现出优异的电催化活性 (η 10 = 450 mV for 10 毫安厘米–2 )。此外，在整体水分解测试中还探索了显着的双功能电催化性能（电池电压为 2.04 V，电流密度为 10 mA cm -2 ）。
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