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Carbon-Coated Nickel Phosphide Nanosheets as Efficient Dual-Electrocatalyst for Overall Water Splitting
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2016-10-07 00:00:00 , DOI: 10.1021/acsami.6b10552 Jing Yu 1, 2 , Qianqian Li 1 , Na Chen 2 , Cheng-Yan Xu 2 , Liang Zhen 2 , Jinsong Wu 1 , Vinayak P. Dravid 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2016-10-07 00:00:00 , DOI: 10.1021/acsami.6b10552 Jing Yu 1, 2 , Qianqian Li 1 , Na Chen 2 , Cheng-Yan Xu 2 , Liang Zhen 2 , Jinsong Wu 1 , Vinayak P. Dravid 1
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Low-cost and efficient electrocatalysts for overall water splitting are in high demand for a wide range of applications across renewable and clean energy. Here, we report a simple one-step synthesis of a three-dimensional (3D) carbon-coated Ni8P3 nanosheet array as bifunctional catalyst for both hydrogen evolution reactions (HER) and oxygen evolution reactions (OER). The nanosheet array possesses low overpotentials, high current densities, and small Tafel slopes in both HER and OER and shows high electrocatalytic activities and long-term stability. The carbon layer with high electric conductivity serves not only as a protective layer to prevent Ni8P3 dissolution but also as an active layer to decrease the electrocatalysis overpotential. The nanosheet array has HER outstanding activity in both acid and alkaline media. Its superior performance in OER can be due to the synergistic interaction at the Ni8P3/NiOx heterojunction. Furthermore, cell voltage as low as 1.65 V can achieve 10 mA cm–2 current density for full water splitting in an alkaline water electrolyzer, indicating potential application of [email protected] Ni8P3 as bifunctional catalyst for clean and renewable energy utilization.
中文翻译：
碳包覆的磷化镍纳米片作为用于整体水分解的高效双电催化剂
对于可再生水和清洁能源的广泛应用，对用于整体水分解的低成本和高效电催化剂有很高的需求。在这里，我们报告的三维（3D）碳涂层的Ni 8 P 3纳米片阵列的简单的一步合成作为双功能催化剂的氢气析出反应（HER）和氧气析出反应（OER）。纳米片阵列在HER和OER中都具有低的超电势，高的电流密度和小的Tafel斜率，并显示出高的电催化活性和长期稳定性。具有高导电性的碳层不仅用作防止Ni 8 P 3的保护层。溶解，但也可以作为活性层以减少电催化超电势。纳米片阵列在酸性和碱性介质中均具有出色的HER活性。其在OER中的优越性能可能归因于Ni 8 P 3 / NiO x异质结处的协同相互作用。此外，低至1.65 V的电池电压可实现10 mA cm –2的电流密度，从而在碱性水电解槽中进行完全水分解，这表明[电子邮件保护] Ni 8 P 3作为双功能催化剂在清洁和可再生能源利用中的潜在应用。
更新日期：2016-10-07
中文翻译：
碳包覆的磷化镍纳米片作为用于整体水分解的高效双电催化剂
对于可再生水和清洁能源的广泛应用，对用于整体水分解的低成本和高效电催化剂有很高的需求。在这里，我们报告的三维（3D）碳涂层的Ni 8 P 3纳米片阵列的简单的一步合成作为双功能催化剂的氢气析出反应（HER）和氧气析出反应（OER）。纳米片阵列在HER和OER中都具有低的超电势，高的电流密度和小的Tafel斜率，并显示出高的电催化活性和长期稳定性。具有高导电性的碳层不仅用作防止Ni 8 P 3的保护层。溶解，但也可以作为活性层以减少电催化超电势。纳米片阵列在酸性和碱性介质中均具有出色的HER活性。其在OER中的优越性能可能归因于Ni 8 P 3 / NiO x异质结处的协同相互作用。此外，低至1.65 V的电池电压可实现10 mA cm –2的电流密度，从而在碱性水电解槽中进行完全水分解，这表明[电子邮件保护] Ni 8 P 3作为双功能催化剂在清洁和可再生能源利用中的潜在应用。
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