Amine group induced high activity of highly torn amine functionalized nitrogen-doped graphene as the metal-free catalyst for hydrogen evolution reaction

Deng, Binglu; Wang, Da; Jiang, Zhongqing; Zhang, Jiye; Shi, Siqi; Jiang, Zhong‐Jie; Liu, Meilin

doi:10.1016/j.carbon.2018.06.008

Cited by 49 publications

(25 citation statements)

References 42 publications

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“…The BQ-Py nanosheets showed one of the smallest ΔE and Tafel slope compared with metal-free nanocarbons to the best of our knowledge (Supplementary Table 3, Supplementary Fig. 12 and Supplementary Note 5) [46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64] . A couple of previous works showed the superior performances, such as graphene with doping of multiple heteroatoms 48 , carbon nitride assembled with graphene 51,52 , graphene with threedimensional nanostructures 53 .…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, a variety of HER catalysts have been studied to alternate platinum . Heteroatom-doped graphene and graphitic carbon nitride showed high electrocatalytic activity as metal-free HER catalyst [46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64] . Previous works indicate that Py and pyridine moieties in 2D graphitic layers serve as the active sites for HER [41][42][43][44] .…”

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confidence: 99%

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Amorphous 2D materials containing a conjugated-polymer network

et al. 2019

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Two-dimensional materials, such as layered compounds and nanosheets, have attracted interest for their characteristic structures and properties. If layered materials containing functional organic molecules are synthesized, designed nanosheets can be obtained by exfoliation. Here we show the design and synthesis of an amorphous organic layered material containing a conjugated-polymer network, its exfoliation into nanosheets, and their applications. Copolymerization of benzoquinone and pyrrole generates random stacks of the conjugated polymer layers through successive CC bond formation and pericyclic reaction under mild conditions at 60°C. The amorphous organic layered materials are efficiently exfoliated into nanosheets in 44.6% after 1 h. The nanosheets are used as a metal-free electrocatalyst for hydrogen evolution reaction with the overpotential 0.28 V (vs. RHE). The present approach may be applied to the design of functional nanosheets with graphenelike structures under mild conditions.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Amorphous 2D materials containing a conjugated-polymer network

et al. 2019

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“…Lan's group successfully prepared a MoS 2 /N-doped rGO hybrid via a hydrothermal approach by using phosphomolybdic acid, thiourea, and GO as precursors. [119] It was interesting to see that Similarly, other NG-based catalysts, including amine-functionalized NG, [121] Pt/NG, [122] Co/NG, [123] Ni/NG, [124] CoSe/NG, [125] MoS 2 /NG, [126] WN x /NG, [127] W x C/NG, [128] Ni 2 P/NG, [129] Fe 2 P/NG, [130] Pt-TiO 2 /NG, [49i] and NiCo-NiO-CoO/NG, [131] have also been fabricated and showed enhanced HER properties compared to those of undoped graphene catalysts.…”

Section: Heteroatom-doped Graphene-based Electrocatalystsmentioning

confidence: 99%

Graphene Nanoarchitectonics: Recent Advances in Graphene‐Based Electrocatalysts for Hydrogen Evolution Reaction

et al. 2019

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Under the double pressure of both the energy crisis and environmental pollution, the exploitation and utilization of hydrogen, a clean and renewable power resource, has become an important trend in the development of sustainable energy-production and energy-consumption systems. In this regard, the electrocatalytic hydrogen evolution reaction (HER) provides an efficient and clean pathway for the mass production of hydrogen fuel and has motivated the design and construction of highly active HER electrocatalysts of an acceptable cost. In particular, graphene-based electrocatalysts commonly exhibit an enhanced HER performance owing to their distinctive structural merits, including a large surface area, high electrical conductivity, and good chemical stability. Considering the rapidly growing research enthusiasm for this topic over the last several years, herein, a panoramic review of recent advances in graphene-based electrocatalysts is presented, covering various advanced synthetic strategies, microstructural characterizations, and the applications of such materials in HER electrocatalysis. Lastly, future perspectives on the challenges and opportunities awaiting this emerging field are proposed and discussed.

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“…The results clearly reveal that CN‐S(3:2) can facilitate the HER process and has higher electrocatalytic performance. The HER activity is comparable to other catalysts in 0.5 mol L −1 H 2 SO 4 as summarized in Table . Figure S5 shows the HER performance of all the samples obtained from precursors that were treated with different molar ratios of NaOH to melamine, CN‐S(3:2) exhibits higher HER activity than the others.…”

Section: Resultsmentioning

confidence: 99%

In situ construction of hierarchical graphitic carbon nitride homojunction as robust bifunctional photoelectrocatalyst for overall water splitting

Luo

Zhang

Han

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Sustainable production of oxygen and hydrogen via catalyst-aided water splitting utilizing solar energy has attracted increasing interest. The primary issue in this field is the development of earth-abundant and active photoelectrocatalytic materials. Herein, a novel hierarchical g-C 3 N 4 /g-C 3 N 4 metal-free homojunction catalyst is synthesized through partial hydrolysis of melamine in alkali and subsequent thermal treatment.RESULTS: The hierarchical g-C 3 N 4 /g-C 3 N 4 metal-free homojunction composed of lamellas features large exposed surface area, abundant interface contact and more channels for mass transfer, making it highly effective for water splitting with a small overpotential of 500 mV at 10 mA cm −2 and low Tafel slope of 93.1 mV dec −1 for oxygen evolution reaction (OER) in 1.0 mol L −1 potassium hydroxide (KOH) solution, as well as 259 mV at 10 mA cm −2 and 109.33 mV dec −1 for hydrogen evolution reaction (HER) in 0.5 mol L −1 sulfuric acid (H 2 SO 4 ) solution. Furthermore, the overpotential and Tafel slope further decrease to 383.4 mV and 69.52 mV dec −1 for OER, 150.1 mV and 67.93 mV dec −1 for HER upon visible light irradiation, demonstrating the exceptional photo-responsive catalytic performance, which can be attributed to the direct Z-scheme homojunction resulting in effective charge transfer and •OH and superoxide free radicals produced under visible light irradiation.CONCLUSION: This work provides a facile but effective approach for the construction of metal-free OER/HER bifunctional catalyst with high photo-responsive performance, achieving higher activity for catalyst-assisted water splitting.

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Amine group induced high activity of highly torn amine functionalized nitrogen-doped graphene as the metal-free catalyst for hydrogen evolution reaction

Cited by 49 publications

References 42 publications

Amorphous 2D materials containing a conjugated-polymer network

Amorphous 2D materials containing a conjugated-polymer network

Graphene Nanoarchitectonics: Recent Advances in Graphene‐Based Electrocatalysts for Hydrogen Evolution Reaction

In situ construction of hierarchical graphitic carbon nitride homojunction as robust bifunctional photoelectrocatalyst for overall water splitting

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