Ni- and P-doped carbon from waste biomass: A sustainable multifunctional electrode for oxygen reduction, oxygen evolution and hydrogen evolution reactions

Hoang, Van Chinh; Gomes, Vincent G.; Dinh, Khang Ngoc

doi:10.1016/j.electacta.2019.05.053

Cited by 80 publications

(33 citation statements)

References 38 publications

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“…Regarding the reaction mechanism, the HER takes place via the Volmer−Heyrowsky or the Volmer−Tafel mechanisms, and for both mechanisms, the HER proceeds through the adsorption of H atoms at the electrode surface (H ads ) [27]. Although the higher activity of PGM and PGM-Free catalysts toward HER in acidic medium as compared to alkaline one, the low durability of those materials in acidbased fuel cells and electrolyzers under operating conditions is still a strong issue [6,28,29]. Thus, alkaline pH has been found to be a proper environment to achieve a good compromise between activity and durability of PGM-Free materials, under operating conditions of cathodes of fuel cells and electrolyzers.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

et al. 2021

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The development of electrocatalysts for energy conversion and storage devices is of paramount importance to promote sustainable development. Among the different families of materials, catalysts based on transition metals supported on a nitrogen-containing carbon matrix have been found to be effective catalysts toward oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) with high potential to replace conventional precious metal-based catalysts. In this work, we developed a facile synthesis strategy to obtain a Fe-N-C bifunctional ORR/HER catalysts, involving wet impregnation and pyrolysis steps. Iron (II) acetate and imidazole were used as iron and nitrogen sources, respectively, and functionalized carbon black pearls were used as conductive support. The bifunctional performance of the Fe-N-C catalyst toward ORR and HER was investigated by cyclic voltammetry, rotating ring disk electrode experiments, and electrochemical impedance spectroscopy in alkaline environment. ORR onset potential and half-wave potential were 0.95 V and 0.86 V, respectively, indicating a competitive performance in comparison with the commercial platinum-based catalyst. In addition, Fe-N-C had also a good HER activity, with an overpotential of 478 mV @10 mAcm−2 and Tafel slope of 133 mVdec−1, demonstrating its activity as bifunctional catalyst in energy conversion and storage devices, such as alkaline microbial fuel cell and microbial electrolysis cells.

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Section: Introductionmentioning

confidence: 99%

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

et al. 2021

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“…Therefore, many researchers have devoted to develop a cheap, stable, and highly efficient OER electrocatalysts. In very recent years, nickel-based conjugates [12][13][14][15][16][17][18][19] and nickel oxide (NiO) nanostructures [20][21][22][23][24][25][26][27][28][29][30][31] have been demonstrated as a promising OER electrocatalyst because of their fast response, high corrosion resistance, earth abundance, low cost, high surface kinetic reaction, and good stability. However, the electrocatalytic OER performances of the NiO nanostructures are still unsatisfiable because of their sluggish kinetics, low electronic conductivity, and limited active Nanomaterials 2020, 10, 1382 2 of 13 sites [32,33].…”

Section: Introductionmentioning

confidence: 99%

Excellent Oxygen Evolution Reaction of Activated Carbon-Anchored NiO Nanotablets Prepared by Green Routes

Lee

Kim

2020

Nanomaterials

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A sustainable and efficient electrocatalyst for the oxygen evolution reaction (OER) is vital to realize green and clean hydrogen production technology. Herein, we synthesized the nanocomposites of activated carbon-anchored nickel oxide (AC-NiO) via fully green routes, and characterized their excellent OER performances. The AC-NiO nanocomposites were prepared by the facile sonication method using sonochemically prepared NiO nanoparticles and biomass-derived AC nanosponges. The nanocomposites exhibited an aggregated structure of the AC-NiO nanotablets with an average size of 40 nm. When using the nanotablets as an OER catalyst in 1 M KOH, the sample displayed superb electrocatalytic performances, i.e., a substantially low value of overpotential (320 mV at 10 mA/cm2), a significantly small Tafel slope (49 mV/dec), and a good OER stability (4% decrease of overpotential after 10 h). These outstanding OER characteristics are considered as attributing to the synergetic effects from both the ample surface area of the electrochemically active NiO nanoparticles and the high electrical conductivity of the AC nanosponges. The results pronounce that the fully ecofriendly synthesized AC-NiO nanotablets can play a splendid role as high-performance electrocatalysts for future green energy technology.

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“…Until now, some common carbon materials doped with phosphorus have attracted the attention of researchers . Due to the larger radius of the phosphorus atom, it is usually grafted on the surface or edge of carbon materials to change the geometry and electronic structure of the carbon material during the doping process.…”

Section: Introductionmentioning

confidence: 99%

“…39 Until now, some common carbon materials doped with phosphorus have attracted the attention of researchers. [40][41][42][43] Due to the larger radius of the phosphorus atom, it is usually grafted on the surface or edge of carbon materials to change the geometry and electronic structure of the carbon material during the doping process. The defective structure on the surface of carbon layer improves electrical conductivity, which is served as promising catalytic for ORR reaction in the fuel cells.…”

Section: Introductionmentioning

confidence: 99%

High‐performance N, P‐CNL nanocomposites as catalyst for oxygen reduction reaction in fuel cell

et al. 2020

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Summary Transition metal and heteroatom codoped carbon materials have become the most promising materials to replace commercial platinum carbon (Pt / C) catalysts due to their low cost, high stability, and methanol resistance. In this work, iron‐nitrogen and phosphorus codoped carbon nanorod‐layer composites (N, P‐CNL) derived from phosphorus‐doped polyaniline (P‐PANI) by phytic acid (PA) and iron salt were successfully obtained after high‐temperature pyrolysis. As a result, the N, P‐CNL materials exhibited good electrocatalytic performance due to abundant active sites. The N, P‐CNL with 50% mass filling ratio of iron salt (named as N, P‐CNL‐1:1) displayed an enhanced limiting current density of −5.97 mA cm−2 at 1600 rpm and outstanding onset potential (−0.004 V) and oxygen reduction peak potential (−0.144 V). In general, this work can give insights into understanding the mechanism of codoped catalysts and synthesis the catalyst with excellent long‐term stability and resistance to methanol crossover and poisoning better than commercial Pt/C.

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Ni- and P-doped carbon from waste biomass: A sustainable multifunctional electrode for oxygen reduction, oxygen evolution and hydrogen evolution reactions

Cited by 80 publications

References 38 publications

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

Excellent Oxygen Evolution Reaction of Activated Carbon-Anchored NiO Nanotablets Prepared by Green Routes

High‐performance N, P‐CNL nanocomposites as catalyst for oxygen reduction reaction in fuel cell

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