Hybrid NiCo hydrogen carbonate with Pt nanoparticles on nickel foam for alkaline water hydrogen evolution

Sun, Jikang; Zhu, Dejun; Sun, Yanfang; Ma, Linzheng; Guo, Jinxue; Liu, Qingyun; Zhang, Xiao

doi:10.1016/j.jallcom.2020.155131

Cited by 14 publications

(11 citation statements)

References 44 publications

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“…Table 4 summarizes the deposition conditions and HER activity of state-of-the-art noble-metalbased electrodes in an alkaline media. [76,77,[83][84][85][86][87][88][89][90][91][92] Cheng et al reported a Pt nanopillar-array catalyst electrodeposited on an anodized aluminum oxide substrate, and the length of the Pt nanopillar could be controlled by adjusting the electrodeposition time. [76] The Pt nanopillar array with a length of 450 nm exhibited an overpotential of 78 mV at −10 mA cm −2 and a Tafel slope of 59 mV dec −1 in a 1.0 M KOH electrolyte.…”

Section: 12mentioning

confidence: 99%

“…Recently, heterostructured catalysts with noble metal/ transition metal combinations have been considered as effective materials for accelerating the water dissociation step, owing to their moderate hydrogen adsorption energy. [83][84][85][86][87][88][89][90][91][92] Zhou et al reported single-atom Pt immobilized on NiO/Ni, which enables the modulation of the adsorption affinity toward both OH* and H*, resulting in a faster water dissociation step and a reduced energy barrier for the Volmer step (Figure 2A). [83] Furthermore, the anchored Pt atoms on the NiO/Ni interfaces induced a more suitable H binding energy (ΔG H* : −0.07 eV) than that of Pt atoms in NiO (ΔG H* : 0.74 eV) and Ni (ΔG H* : −0.38 eV), which efficiently facilitated H* conversion and H 2 desorption for improved HER activity in alkaline media.…”

Section: 12mentioning

confidence: 99%

“…Table 4 summarizes the deposition conditions and HER activity of state‐of‐the‐art noble‐metal‐based electrodes in an alkaline media. [ 76,77,83–92 ]…”

Section: Self‐supported Electrodes Prepared By Electrodepositionmentioning

confidence: 99%

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Electrodeposition: An efficient method to fabricate self‐supported electrodes for electrochemical energy conversion systems

Kim

Han

et al. 2022

Exploration

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The development of electrocatalysts for energy conversion systems is essential for alleviating environmental problems and producing useful energy sources as alternatives to fossil fuels. Improving the catalytic performance and stability of electrocatalysts is a major challenge in the development of energy conversion systems. Moreover, understanding their electrode structure is important for enhancing the energy efficiency. Recently, binder-free self-supported electrodes have been investigated because the seamless contact between the electrocatalyst and substrate minimizes the contact resistance as well as facilitates fast charge transfer at the catalyst/substrate interface and high catalyst utilization. Electrodeposition is an effective and facile method for fabricating self-supported electrodes in aqueous solutions under mild conditions. Facile fabrication without a polymer binder and controlability of the compositional and morphological properties of the electrocatalyst make electrodeposition methods suitable for enhancing the performance of energy conversion systems. Herein, we summarize recent research on self-supported electrodes fabricated by electrodeposition for energy conversion reactions, particularly focusing on cathodic reactions of electrolyzer system such as hydrogen evolution, electrochemical CO 2 reduction, and electrochemical N 2 reduction reactions. The deposition conditions, morphological and compositional properties, and catalytic performance of the electrocatalyst are reviewed. Finally, the prospective directions of electrocatalyst development for energy conversion systems are discussed.

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Section: 12mentioning

confidence: 99%

Section: 12mentioning

confidence: 99%

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Electrodeposition: An efficient method to fabricate self‐supported electrodes for electrochemical energy conversion systems

Kim

Han

et al. 2022

Exploration

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“…Etkinliği ve korozyon direncini arttırmak için ikili alaşımlar yapılarak, bu sayede yüzey morfolojiler değiştirilmekte ve geniş yüzey alanlı elektrokatalizörler elde edilmektedir [5]. Bunlara örnek olarak NiCu [6], FeCo [7], NiCo [8], NiMo [9] elektrokatalizörleri verilebilir. Bu elektrokatalizörlerde aşırı gerilimler düşürülerek yüksek etkinlikler elde edilmiştir.…”

Section: Introductionunclassified

CuZn Elektrotundan Zn’nin Uzaklaştırılmasının Hidrojen Çıkış Davranışı Üzerine Etkisi

Döşlü¹

2021

Fırat Üniversitesi Mühendislik Bilimleri Dergisi

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Öz: Hidrojen üretiminde, elektrokimyasal yolla suyun ayrıştırılmasında yüksek katalitik aktiviteye sahip ve kararlı elektrotların geliştirilmesi çok önemlidir. Burada, CuZn elektrotunun fabrikasyonunu yapmak için ucuz alkali uzaklaştırma yöntemi kullanılmış ve bu yöntem elektrota, hidrojen oluşum reaksiyonu (HER) için yüksek yüzey alanı ve verimli aktif merkezler sağlamıştır. CuZn elektrotu karakterize etmek için, taramalı elektron mikroskop (SEM), enerji dağılımlı X-Işını (EDX), atomik kuvvet mikroskop (AFM) ve Dönüşümlü voltametri (CV) tekniklerinden yararlanılmıştır. CuZn elektrotunun hidrojen oluşum karakteristiği 1,0 M KOH çözeltisinde, bakır kaplı bakır elektrot (Cu/Cu) ile kıyaslanmıştır. SEM analizlerine göre, Cu/Cu elektrotta bakır nano-tanecikler yüzeye dağılırken, CuZn elektrotta karnabahara benzeyen şekiller elde edilmiştir. Metallerin karakteristik pikleri CV ve EDX spektrumlarında ortaya çıkmıştır. HER etkinlikleri değerlendirildiğinde, CuZn elektrot (0.309 mA cm-2), Cu/Cu elektrot (0.043 mA cm-2) ile kıyaslandığında yüksek yük değişimi akım yoğunluğu elde edilmiştir. Ayrıca, CuZn elektrot, 50 mA cm-2 akım yoğunluğunda daha düşük aşırı gerilime ve daha düşük Tafel eğimine sahiptir. Bu CuZn elektrotun Cu/Cu elektrotundan daha yüksek HER performansına sahip olduğu anlamına gelir. Bu yüksek katalitik aktivite, alkali uzaklaştırma nedeniyle yüksek yüzey alanı ve Zn ve Cu metallerinin sinerjistik etkisi ile açıklanabilir. Bu deneylere ek olarak, CuZn elektrot bazik ortamda 18000 saniye boyunca oldukça yüksek kararlılık ve dayanıklılık göstermiştir.

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“…To overcome the problems in these applications, low hydrogen overvoltage electrodes are needed. Studies are still being conducted as a result of this quest 19‐23 . Electrodes with high catalytic activity and low cost are needed to make hydrogen gas production by the electrolysis of water more appealing with lower costs.…”

Section: Introductionmentioning

confidence: 99%

Production of NF / NiCo /Ag catalyst for hydrogen generation in alkaline medium

Mert

2021

Intl J of Energy Research

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Summary The nickel foam (NF) precursors were doped with nickel, cobalt particles with various chemical compositions; the most convenient one was decorated with silver nano‐domes and investigated for hydrogen production efficiency (HPE) in 1 M KOH. The X‐ray diffraction, field emission scanning electron microscopy, and energy‐dispersive X‐ray techniques were used to characterize the catalysts. Linear sweep voltammetry, cyclic voltammetry, Tafel polarization measurements, electrochemical impedance spectroscopy, and chronoamperometry were used to determine the electrochemical efficiency. The rough structured Ni‐ and Co‐deposited NF significantly increased the HPE achieved with silver nano‐domes particles decoration (NF/NiCo‐2/Ag). The results showed that NF/NiCo‐2/Ag was the most efficient catalyst, as it has lower hydrogen overpotential and a higher HPE, which was detected in polarization curves, as well as being stable during the 1 × 104 s electrolysis period and having a good response during electrochemical analysis. The produced hydrogen gas volume was 108.1 mL by using NF/NiCo‐2/Ag, at the end of 30‐minute electrolysis in 1 M KOH.

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Hybrid NiCo hydrogen carbonate with Pt nanoparticles on nickel foam for alkaline water hydrogen evolution

Cited by 14 publications

References 44 publications

Electrodeposition: An efficient method to fabricate self‐supported electrodes for electrochemical energy conversion systems

Electrodeposition: An efficient method to fabricate self‐supported electrodes for electrochemical energy conversion systems

CuZn Elektrotundan Zn’nin Uzaklaştırılmasının Hidrojen Çıkış Davranışı Üzerine Etkisi

Production of NF / NiCo /Ag catalyst for hydrogen generation in alkaline medium

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