A zinc-nitrate battery for efficient ammonia electrosynthesis and energy output by a high entropy hydroxide catalyst

IF 9.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chinese Chemical Letters Pub Date : 2025-05-09 DOI:10.1016/j.cclet.2025.111294

Mingxing Chen, Xue Li, Nian Liu, Zihe Du, Zhitao Wang, Jing Qi

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Abstract

Zinc-nitrate battery could produce electrical power, remove pollutant nitrate and obtain value-added ammonia, where the cathodic reaction of converting nitrate to ammonia is sluggish and complex due to the involvement of multi-electron transfer. Thus, highly efficient catalysts for nitrate reduction reaction (NO₃RR) are greatly needed. In this work, we report a high entropy hydroxide (HE-OH) as an excellent NO₃RR catalyst, which could achieve high NH₃ Faradaic efficiencies (e.g., nearly 100 % at −0.3 V versus reversible hydrogen electrode) and high yield rates (e.g., 30.4 mg h⁻¹cm⁻² at −0.4 V). Moreover, HE-OH could also deliver a current density of 10 mA/cm² at an overpotential of 260 mV for oxygen evolution reaction. The assembled zinc-nitrate battery using HE-OH as the cathode demonstrates a high power density (e.g., 3.62 mW/cm²), rechargeability and stability.

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一种用于高熵氢氧化物催化剂高效氨电合成和能量输出的硝酸锌电池

硝酸锌电池可以产生电能，去除污染物硝酸盐，获得增值氨，但由于涉及多电子转移，硝酸转化为氨的阴极反应缓慢且复杂。因此，需要高效的硝酸还原反应催化剂（NO3RR）。在这项工作中，我们报道了一种高熵氢氧化物（HE-OH）作为一种优秀的NO3RR催化剂，它可以实现高NH3法拉第效率（例如，在−0.3 V下，与可逆氢电极相比，接近100 %）和高收率（例如，在−0.4 V下，30.4 mg h−1cm−2）。此外，HE-OH还可以在260 mV的过电位下为析氧反应提供10 mA/cm2的电流密度。以HE-OH为阴极组装的硝酸锌电池具有高功率密度（例如3.62 mW/cm2）、可充电性和稳定性。

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来源期刊

Chinese Chemical Letters 化学-化学综合

CiteScore

14.10

自引率

15.40%

发文量

8969

审稿时长

1.6 months

期刊介绍： Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.