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Surface and interface engineering of CoNi layered double hydroxides for efficient methanol oxidation reaction

机译：Coni分层双氢氧化物的表面和界面工程，高效甲醇氧化反应

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摘要

In this report, surface atomic engineering (P doping) and interface molecular engineering (coupling with reduced graphene oxide) were adopted to adjusting the chemical compositions, morphological structure, electronic properties and methanol oxidation reaction (MOR) activity of CoNi layered double hydroxides (CoNi LDHs). Low-electronegative P atom doping can improve the conductivity and induce a synergistic effect to increase MOR activity. Coupling P doped CoNi LDHs (P-CoNi LDHs) with reduced graphene oxide (rGO) to produce composite structures (rGO/P-CoNi LDHs) can impart novel electronic and morphological properties, thereby boosting the MOR activity even further. The P-CoNi LDHs with different morphology and the rGO/P-CoNi LDHs composite were prepared by a cyclic voltammetry (CV) deposition method, which can be directly used as a binder free electrode for MOR. Morphology characterization and electrochemical results indicate that the uniform red-bayberry like P-CoNi LDHs, which were prepared in water solvent, exhibit the highest MOR activity compared with those prepared in alcohol-water component electrolyte, which was 2 times higher than the undoped CoNi LDHs. The introduction of rGO enhance the MOR activity and stability even further, the MOR activity of ball flower like rGO/P-CoNi LDHs was 1.7 times higher than P-CoNi LDHs, the current density retention is 97% after 1000 s at 0.6 V, which is higher than that of P-CoNi LDHs (87%), but the long-term stability still remains to rise. This report may provide a new insight into design and prepare high electrochemical performance LDHs.
机译：在本报告中，采用表面原子工程（P掺杂）和界面分子工程（与石墨烯氧化物的耦合）调节Coni分层双氢氧化物的化学成分，形态结构，电子性质和甲醇氧化反应（Mor）活性（Coni LDHS）。低电负剂P原子掺杂可以提高电导率并诱导增加MOR活动的协同效应。将P掺杂的ConiLDHS（P-CONI LDHs）具有较低的石墨烯（RGO）产生复合结构（RGO / P-CONI LDH）可以赋予新颖的电子和形态特性，从而进一步提高MOR活动。具有不同形态学和RGO / P-CONILDHS复合材料的P-CONI LDH通过环状伏安法（CV）沉积方法制备，其可以直接用作MOR的粘合剂游离电极。形态学表征和电化学结果表明，在水溶剂中制备的p-coni ldh等均匀的红杨梅，与醇 - 水成分电解质中制备的那些相比，其表现出最高的MOR活动，这比未掺杂的塞尼高2倍LDHS。 Rgo提高了MOR活动和稳定性的进一步，rgo / p-coni ldh等的球花的Mor活动比p-coni ldhs高1.7倍，在0.6V的1000秒后电流密度保留为97％，这高于p-coni ldhs（87％），但长期稳定性仍然仍然升高。本报告可提供对设计的新洞察力，并准备高电化学性能LDH。

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  • 来源
    《RSC Advances》 |2017年第72期|共10页
  • 作者

    Luo Shuli; Qian Lei; Liao Menglong; Hu Xiaorong; Xiao Dan;

  • 作者单位

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

    Sichuan Univ Coll Chem Chengdu 610064 Sichuan Peoples R China;

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