Akram Raheel, Arif Muhammad, Arshad Anila, Zhang Shuangkun, Liu Wei, Wu Zhanpeng, Zhang Teng
Key Laboratory of Carbon fiber and functional polymers, Beijing University of Chemical Technology, Ministry of education, Beijing, 100029, China.
Institute of Chemical and Environmental Engineering, Khawaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Punjab, 64200, Pakistan.
Chem Asian J. 2023 Dec 1;18(23):e202300718. doi: 10.1002/asia.202300718. Epub 2023 Nov 6.
A leap-forward approach has been successfully devised to synthesize a novel hierarchical binary metal modified heteroatom doped 2D micro-/mesporous carbon-graphene nanostructure (NPSMC@Ir-Ru@rGO) for overall water splitting application. To investigate the role of decorating metals, different electrolcatalysts like NPSMC, NPSMC@rGO, NPSMC@Ir@rGO, and NPSMC@Ru@rGO were also synthesized and structural changes were compared and investigated by physiochemical techniques. All of the samples have shown electrocatalytic activities attributed to the presence of heteroatom (N, P, S) doped micro-/mesoporous carbonaceous matrix, amorphous carbon in the coexistence of graphitic lattice carbons, presence of active metal NPs (Ir and/-or Ru), an even distribution of active sites, and graphene 2D interconnected channels to promote electron transfer ability, respectively. However, the Ir-Ru metal codeped nanocatalyst (NPCMS@Ir-Ru@rGO) is proved to be an excellent electrocatalyst based on the synergistic role of Ir-Ru metals that necessitates the low overpotentials of 181 mV and 318 mV to convey a current density of 10 mA cm towards the electroctalytic application of HER and OER, respectively. Furthermore, exhibiting the corresponding Tafel slopes (132 and 70 mV dec ) in an alkaline medium. This work is anticipated to open up new avenues for the development of promising electrocatalysts based on active metals modified heteroatom doped carbon nanomaterials for energy applications.
一种跨越式方法已成功设计出来，用于合成一种新型的分级二元金属修饰的杂原子掺杂二维微/介孔碳-石墨烯纳米结构（NPSMC@Ir-Ru@rGO），用于整体水分解应用。为了研究修饰金属的作用，还合成了不同的电催化剂，如NPSMC、NPSMC@rGO、NPSMC@Ir@rGO和NPSMC@Ru@rGO，并通过物理化学技术比较和研究了结构变化。所有样品均显示出电催化活性，这分别归因于杂原子（N、P、S）掺杂的微/介孔碳质基质的存在、石墨晶格碳共存中的无定形碳、活性金属纳米颗粒（Ir和/或Ru）的存在、活性位点的均匀分布以及石墨烯二维互连通道以促进电子转移能力。然而，基于Ir-Ru金属的协同作用，Ir-Ru金属共沉积纳米催化剂（NPCMS@Ir-Ru@rGO）被证明是一种优异的电催化剂，在HER和OER的电催化应用中，分别需要181 mV和318 mV的低过电位来传递10 mA cm的电流密度。此外，在碱性介质中表现出相应的塔菲尔斜率（132和70 mV dec）。这项工作有望为基于活性金属修饰的杂原子掺杂碳纳米材料开发有前景的电催化剂用于能源应用开辟新途径。
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