Graphitic Carbon Nitride Platforms Modified with Gold-Aryl Nanoparticles for Efficient Electrocatalytic Hydrogen Evolution

IF 4.1 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Comments on Inorganic Chemistry Pub Date : 2022-06-05 DOI:10.1080/02603594.2022.2078316

Javad B. M. Parambath, Najrul Hussain, H. Alawadhi, Yeji Park, D. Dionysiou, Changseok Han, Ahmed Abouzeed Mohamed

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引用次数: 1

Abstract

ABSTRACT Electrocatalytic hydrogen evolution reactions (HER) offer an enduring strategy for hydrogen fuel production and are vital for sustainable energy conversion and storage. To explore efficient and durable HER electrocatalysts, we fabricated gold-aryl nanoparticles (AuNPs-COOH) anchored on graphitic carbon nitride (g-C3N4) sheets by reducing aryldiazonium tetrachloroaurate(III) salt with sodium borohydride at room temperature in water. Two different nanocomposites, AuNPs-COOH-g-C3N4 (H) (higher amount of g-C3N4) and AuNPs-COOH-g-C3N4 (L) (lower amount of g-C3N4) were prepared. Contact angle measurements revealed that the increased surface wettability of the nanocomposites on glass and silicon wafer surfaces compared to pristine g-C3N4. Cyclic voltammetry, electrochemical impedance spectroscopy, double-layer capacitance, linear sweep voltammetry, and chronoamperometry measurements revealed that AuNPs-COOH-g-C3N4 (L) displayed the best HER performance in 0.1 M H2SO4 electrolyte. Overall, nanocomposites exhibited higher electrocatalytic activity compared to bare AuNPs-COOH and pristine g-C3N4 in current density and onset potential values. The AuNPs-COOH-g-C3N4 (L) nanocomposite offered an excellent electrocatalytic activity and displayed a current density of 53.4 mA/cm2 at 0.72 V vs RHE, which is nearly twice compared to bare AuNPs-COOH of 33.1 mA/cm2. In addition, the nanocomposite showed the lowest onset potential of 0.14 V vs RHE compared to 0.26 V and 0.31 V for AuNPs-COOH-g-C3N4 (H) and AuNPs-COOH, respectively.

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金-芳基纳米颗粒修饰的氮化碳石墨平台用于高效电催化析氢

电催化析氢反应(HER)为氢燃料生产提供了一种持久的策略，对可持续的能量转换和储存至关重要。为了探索高效耐用的HER电催化剂，我们在室温下用硼氢化钠还原四氯酸芳基重氮铵(III)盐，制备了锚定在石墨氮化碳(g-C3N4)片上的金-芳基纳米颗粒(AuNPs-COOH)。制备了两种不同的纳米复合材料AuNPs-COOH-g-C3N4 (H) (g-C3N4用量较高)和AuNPs-COOH-g-C3N4 (L) (g-C3N4用量较低)。接触角测量显示，与原始的g-C3N4相比，纳米复合材料在玻璃和硅晶圆表面的表面润湿性增加。循环伏安法、电化学阻抗法、双层电容法、线性扫描伏安法和计时安培法等测试结果表明，AuNPs-COOH-g-C3N4 (L)在0.1 M H2SO4电解质中表现出最佳的HER性能。总的来说，纳米复合材料在电流密度和起始电位值方面比裸AuNPs-COOH和原始g-C3N4表现出更高的电催化活性。AuNPs-COOH-g- c3n4 (L)纳米复合材料具有优异的电催化活性，在0.72 V vs RHE下电流密度为53.4 mA/cm2，是裸AuNPs-COOH电流密度33.1 mA/cm2的近两倍。此外，与AuNPs-COOH-g- c3n4 (H)和AuNPs-COOH相比，纳米复合材料对RHE的起效电位最低，分别为0.26 V和0.31 V。

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来源期刊

Comments on Inorganic Chemistry 化学-无机化学与核化学

CiteScore

9.00

自引率

1.90%

发文量

审稿时长

>12 weeks

期刊介绍： Comments on Inorganic Chemistry is intended as a vehicle for authoritatively written critical discussions of inorganic chemistry research. We publish focused articles of any length that critique or comment upon new concepts, or which introduce new interpretations or developments of long-standing concepts. “Comments” may contain critical discussions of previously published work, or original research that critiques existing concepts or introduces novel concepts. Through the medium of “comments,” the Editors encourage authors in any area of inorganic chemistry - synthesis, structure, spectroscopy, kinetics and mechanisms, theory - to write about their interests in a manner that is both personal and pedagogical. Comments is an excellent platform for younger inorganic chemists whose research is not yet widely known to describe their work, and add to the spectrum of Comments’ author profiles, which includes many well-established inorganic chemists.