Efficient Electrochemical N2 Reduction to NH3 on MoN Nanosheets Array under Ambient Conditions,ACS Sustainable Chemistry & Engineering

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Efficient Electrochemical N2 Reduction to NH3 on MoN Nanosheets Array under Ambient Conditions
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-07-13 00:00:00 , DOI: 10.1021/acssuschemeng.8b01438
Ling Zhang _{1,

2} , Xuqiang Ji ₁ , Xiang Ren ₁ , Yonglan Luo ₁ , Xifeng Shi ₃ , Abdullah M. Asiri ₄ , Baozhan Zheng ₂ , Xuping Sun ₁

Affiliation

Electrochemical N₂ reduction reaction (NRR) under ambient conditions offers us an environmentally friendly route for artificial synthesis of NH₃. However, up to now, few noble-metal-free electrocatalysts with satisfactory catalytic activities have been explored. In this Letter, we demonstrate that MoN nanosheets array on carbon cloth (MoN NA/CC) acts as a high-performance NRR electrocatalyst toward NH₃ electrosynthesis in 0.1 M HCl under ambient conditions. This catalyst achieves a large NH₃ yield of 3.01 × 10^–10 mo1 s^–1 cm^–2 and a Faradaic efficiency of 1.15% at −0.3 V vs reversible hydrogen electrode with strong electrochemical durability and selectivity. Density functional theory calculations reveal that MoN NA/CC catalyzes NRR via the Mars–van Krevelen mechanism.

中文翻译：

MoN纳米片阵列在环境条件下有效的电化学N ₂还原为NH ₃

环境条件下的电化学N ₂还原反应（NRR）为我们提供了一种人工合成NH _3的环保途径。然而，迄今为止，几乎没有探索具有令人满意的催化活性的无贵金属的电催化剂。在这封信中，我们证明了碳布上的MoN纳米片阵列（MoN NA / CC）在环境条件下可作为高性能NRR电催化剂，用于在0.1 M HCl中进行NH ₃电合成。该催化剂可实现3.01×10 ^–10 mo1 s ^–1 cm ^–2的大NH ₃收率与可逆氢电极相比，在-0.3 V时的法拉第效率为1.15％，具有强大的电化学耐久性和选择性。密度泛函理论计算表明，MoN NA / CC通过Mars–van Krevelen机制催化NRR。

更新日期：2018-07-13

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