Metal–organic framework-derived Zn0.975Co0.025S/CoS2 embedded in N,S-codoped carbon nanotube/nanopolyhedra as an efficient electrocatalyst for overall water splitting†,Journal of Materials Chemistry A

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Metal–organic framework-derived Zn0.975Co0.025S/CoS2 embedded in N,S-codoped carbon nanotube/nanopolyhedra as an efficient electrocatalyst for overall water splitting†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-05-01 00:00:00 , DOI: 10.1039/c8ta01370e
Zhou Yu _{1,

2,

3,

4,

5} , Yu Bai _{2,

4,

5,

6,

7} , Shimin Zhang _{1,

2,

3,

4} , Yuxuan Liu _{1,

2,

3,

4} , Naiqing Zhang _{2,

4,

5,

6,

8} , Kening Sun _{2,

4,

5,

6,

8}

Affiliation

The development of high-efficiency, low-cost and stable bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is extremely crucial to promote sustainable energy technologies, yet remains a long and arduous challenge. In this work, Zn and Co bimetallic zeolitic imidazolate framework (ZnCo-ZIF) templates were used to synthesize Zn_0.975Co_0.025S/CoS₂ nanoparticles embedded in N,S-codoped carbon nanotube/nanopolyhedra (ZnCoS-NSCNT/NP) via a facile two-step method. Benefitting from the synergetic effect of two metal sulfide species, mesoporous polyhedral structure, N,S-codoped carbon matrix and deep-rooted CNT networks, the product exhibits excellent catalytic performance for both the HER and OER in 1 M KOH, affording a low overpotential of 270 mV for the OER and 152 mV for the HER at a current density of 10 mA cm⁻². More importantly, by utilizing ZnCoS-NSCNT/NP as the electrocatalyst for both the cathode and anode in an electrolyzer for overall water splitting, a current density of 10 mA cm⁻² at 1.59 V and long-term durability (40 h) were achieved. This work opened a new possibility for exploring non-precious-metal catalysts for overall water splitting.

中文翻译：

嵌入N，S掺杂的碳纳米管/纳米多面体中的金属有机框架衍生的Zn _0.975 Co _0.025 S / CoS ₂作为有效的整体水分解电催化剂†

氧释放反应（OER）和氢释放反应（HER）的高效，低成本和稳定的双功能电催化剂的开发对于促进可持续能源技术至关重要，但仍然是一个长期而艰巨的挑战。在这项工作中，Zn和Co双金属沸石咪唑酯骨架结构（碳酸锌-ZIF）模板被用于合成的Zn _0.975钴_0.025 S / CoS的_2个嵌入在N，纳米粒子S-共掺杂的碳纳米管/ nanopolyhedra（ZnCoS-NSCNT / NP）经由简便的两步法。得益于两种金属硫化物，介孔多面体结构，N，S掺杂的碳基体和深层CNT网络的协同作用，该产品在1 M KOH中对HER和OER均表现出优异的催化性能，且超电势低在10 mA cm ^-2的电流密度下，对于OER为270 mV，对于HER为152 mV 。更重要的是，通过将ZnCoS-NSCNT / NP用作电解池中用于整体水分解的阴极和阳极的电催化剂，在1.59 V时的电流密度为10 mA cm ^-2，并具有长期耐久性（40 h）。这项工作为探索用于整体水分解的非贵金属催化剂开辟了新的可能性。

更新日期：2018-05-01

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