Bifunctional porous Co-doped NiO nanoflowers electrocatalysts for rechargeable zinc-air batteries

Qian, Jinmei; Guo, Xiaosong; Wang, Tongtong; Liu, Peitao; Zhang, Hong; Gao, Daqiang

doi:10.1016/j.apcatb.2019.03.021

Cited by 103 publications

(42 citation statements)

References 53 publications

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“…To support the Faradaic electrochemical active sites, electrochemical active surface area (ECSA) was estimated through double layer capacitance ( C dl ; Δ j =| j a – j c |) measurements in the non‐Faradic region. C dl is directly proportional to the ECSA of catalysts . Figure S3 shows the measured Δ j as function of scan rate.…”

Section: Resultsmentioning

confidence: 99%

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Electrochemical Cathodic Treatment of Mild Steel as a Host for Ni(OH)₂ Catalyst for Oxygen Evolution Reaction in Alkaline Media

et al. 2019

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Oxygen evolution reaction (OER) catalysts and substrates play a vital role in the electrochemical water splitting process to generate chemical fuel and store renewable energy. The design and development of cost effective and efficient catalysts and substrates is still crucial and progressive towards the commercialization of water electrolyser. Herein, we have shown abundant mild steel (MS) as an efficient substrate as well as a catalyst host for OER by the cathodic treatment followed by the electrodeposited Ni(OH)2 at room temperature. The C MS Ni(OH)2 shows an overpotential (η) of 267 mV at a current density of 10 mA cm−2 with a Tafel slope of 66 mV dec−1, and affordable stability at the benchmark scale of 10 mA cm−2 current density operation for 10 h and harsh condition of 100 mA cm−2 current density for 50 h in the continuous electrolysis chronoamperometry test in 1 M KOH. The higher catalytic activity of C MS Ni(OH)2 compared to Ni(OH)2 electrodeposited on MS is due to the interaction of Fe(OH)2/FeOOH and Ni(OH)2/NiOOH. These results suggest a possible way to utilize MS substrates as catalyst and as a host for OER and other electrochemical applications in the future.

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Section: Resultsmentioning

confidence: 99%

“…C dl is directly proportional to the ECSA of catalysts. [30,31] Figure S3 shows the measured Δj as function of scan rate. Higher C dl was observed for the C MS Ni(OH) 2 when compared to others (MS, C MS and MS Ni(OH) 2 ).…”

Section: Electrochemical Characteristicsmentioning

confidence: 99%

Electrochemical Cathodic Treatment of Mild Steel as a Host for Ni(OH)₂ Catalyst for Oxygen Evolution Reaction in Alkaline Media

et al. 2019

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“…The turnover frequency (TOF) was evaluated as reported previously. [31][32][33] E RHE ¼ E Ag/AgCl + 0.197 + 0.059 Â iR.…”

Section: Electrochemical Oer Testmentioning

confidence: 99%

Efficient electrocatalyst of α-Fe₂O₃ nanorings for oxygen evolution reaction in acidic conditions

et al. 2020

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“…In 2009, Dai's group reported that vertically aligned N‐doped carbon nanotubes show better ORR activities than Pt in terms of larger diffusion current, [7] which booms the exploration of heteroatom‐doped porous carbon materials as ORR and OER catalysts to replace precious metals [8] . In comparison to non‐precious metal oxides, [9–13] metal carbide/carbon composite materials, [14–17] electrocatalyst base on metal‐free carbon doped by heteroatoms (e. g., N, P, S, B and F), [18–20] especially N‐doped porous carbon (NPC) materials, show distinct advantages in wide availability, strong durability, designable carbon framework, and excellent electroactivity [21–23] …”

Section: Introductionmentioning

confidence: 99%

Mono‐Doped Carbon Nanofiber Aerogel as a High‐Performance Electrode Material for Rechargeable Zinc‐Air Batteries

Chen

Chu

et al. 2021

ChemElectroChem

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Nitrogen‐doped porous carbon (NPC) materials have attracted increased attention for zinc‐air battery (ZAB) applications because of their comparable electrocatalytic activity to precious metals. However, few metal‐free NPC catalysts exhibit an oxygen reduction reaction performance better than Pt catalysts, together with high oxygen evolution reaction catalytic activity. Herein, an efficient oxygen electrocatalyst based on highly integrated carbon nanofiber (CNF) and NPC aerogels, with CNF as the core and NPC as the shell, is demonstrated. The NPC@CNF aerogels are prepared through a large‐scale, direct pyrolysis of metal‐organic frameworks and bacterial cellulose hybrids. This mono‐doped carbon material with nitrogen heteroatoms displays outstanding bifunctional performance compared to the individual counterparts, which demonstrates the effectiveness of morphological and structural engineering. Density functional theory calculations reveal that the active sites with the participation of multi‐electrons weaken the O−O bond and facilitate the four‐electron oxygen reduction in the dissociation pathway. The ZAB based on the NPC@CNF air electrode exhibits a peak density of 96 mW cm−2 and a stable charge–discharge durability of over 420 cycles with an overpotential increase of only 0.10 V, indicating that the mono‐doped NPC@CNF performs as one of the best bifunctional catalysts among those recently reported metal‐based and metal‐free catalysts.

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Bifunctional porous Co-doped NiO nanoflowers electrocatalysts for rechargeable zinc-air batteries

Cited by 103 publications

References 53 publications

Electrochemical Cathodic Treatment of Mild Steel as a Host for Ni(OH)₂ Catalyst for Oxygen Evolution Reaction in Alkaline Media

Electrochemical Cathodic Treatment of Mild Steel as a Host for Ni(OH)₂ Catalyst for Oxygen Evolution Reaction in Alkaline Media

Efficient electrocatalyst of α-Fe₂O₃ nanorings for oxygen evolution reaction in acidic conditions

Mono‐Doped Carbon Nanofiber Aerogel as a High‐Performance Electrode Material for Rechargeable Zinc‐Air Batteries

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Bifunctional porous Co-doped NiO nanoflowers electrocatalysts for rechargeable zinc-air batteries

Cited by 103 publications

References 53 publications

Electrochemical Cathodic Treatment of Mild Steel as a Host for Ni(OH)2 Catalyst for Oxygen Evolution Reaction in Alkaline Media

Electrochemical Cathodic Treatment of Mild Steel as a Host for Ni(OH)2 Catalyst for Oxygen Evolution Reaction in Alkaline Media

Efficient electrocatalyst of α-Fe2O3 nanorings for oxygen evolution reaction in acidic conditions

Mono‐Doped Carbon Nanofiber Aerogel as a High‐Performance Electrode Material for Rechargeable Zinc‐Air Batteries

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Electrochemical Cathodic Treatment of Mild Steel as a Host for Ni(OH)₂ Catalyst for Oxygen Evolution Reaction in Alkaline Media

Electrochemical Cathodic Treatment of Mild Steel as a Host for Ni(OH)₂ Catalyst for Oxygen Evolution Reaction in Alkaline Media

Efficient electrocatalyst of α-Fe₂O₃ nanorings for oxygen evolution reaction in acidic conditions