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Novel Synthesis of Graphene Supported Nickel Borides from Metal Organic Framework Precursors

机译：石墨烯的新型合成金属有机框架前体的镍硼硼

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As the worlds supply of fossil fuels dwindles, more and more research is being conducted to find a reliable alternative energy source. One promising source of energy is hydrogen, which is not only the most abundant element in the universe, but when burned as a fuel source produces only water as a biproduct. The main issue preventing hydrogen from being utilized as a fuel source is the storage. Hydrogen primarily exists as a gas and must be stored in compressed tanks. These tanks run the risk of explosions, so work is being done to produce hydrogen gas over time with a hydrogen feedstock material (HFM). Sodium borohydride (NaBH_4) is an HFM that contains 10.8% hydrogen by weight and readily reacts with water to produce hydrogen gas. This reaction occurs slowly and needs a catalyst to make its hydrogen production viable. In the past, work has been done with precious metal catalysts and metal catalyst support on carbon materials. The goal of this study was to explore a novel method of synthesizing nickel borides supported on graphene (NiB@G). NiB@G was formed by the reduction of a metal organic framework precursor (NiMOF-5@GO) at room temperature (RT 295K). Both NiMOF-5@GO and NiB@G were characterized using Powder X-Ray Diffraction (PXRD), Scanning Electron Mircroscopy (SEM, Figure 1), Energy Dispersive X-Ray Spectroscopy (EDS), Transmission Electron Microscopy (TEM), and Fourier Transform Infrared Spectroscopy (FTIR). NiB@G was additionally characterized with Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) and tested for its catalytic ability at temperatures of 283K-303K. This product showed an excellent activation energy of 49 kJ mol~(-1) compared to previous work with nickel, cobalt, and raney-nickel catalysts. This product also showed good stability, performing well after multiple uses of the same catalyst. A novel method of producing an efficient catalyst for the hydrolysis of sodium borohydride will help scientists move forward in the mass production of hydrogen fuel.
机译：随着世界各地的化石燃料，正在进行越来越多的研究以找到可靠的替代能源。一个有希望的能源来源是氢气，这不仅是宇宙中最丰富的元素，而且当燃烧时，因为燃料源仅产生水作为双倍折叠。防止氢被用作燃料源的主要问题是储存。氢主要作为气体存在并且必须储存在压缩罐中。这些坦克冒着爆炸的风险，因此正在进行工作以随着氢气原料材料（HFM）产生氢气。硼氢化钠（NaBH_4）是一种HFM，其含有10.8％的氢重量，并且易于与水反应以产生氢气。该反应缓慢发生并且需要催化剂以使其氢产生可行。过去，在碳材料上用贵金属催化剂和金属催化剂载体进行了工作。本研究的目的是探讨合成石墨烯（NIB @ G）支持的镍硼化物的新方法。通过在室温（RT 295K）下的金属有机框架前体（Nimof-5 @ Go）的减少来形成NIB @ g。使用粉末X射线衍射（PXRD），扫描电子Mircroscopy（SEM，图1），能量分散X射线光谱（EDS），透射电子显微镜（TEM），扫描电子显微镜（SEM），以及傅里叶变换红外光谱（FTIR）。 NIB @ G另外的表征具有电感耦合的等离子体原子发射光谱（ICP-AES）并在283k-303k的温度下测试其催化能力。本产品显示出49kJ摩尔〜（-1）的优异活化能量，与先前与镍，钴和阮内镍催化剂一起使用。该产品还显示出良好的稳定性，在相同催化剂的多种用途后表现良好。一种用于生产硼氢化钠水解的有效催化剂的新方法将有助于科学家在氢燃料的批量生产中向前发展。

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