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Edge‐Functionalized Graphene Nanoplatelets as Metal‐Free Electrocatalysts for Dye‐Sensitized Solar Cells
Advanced Materials ( IF 27.4 ) Pub Date : 2018-12-09 , DOI: 10.1002/adma.201804440 Do Hyung Kweon 1 , Jong‐Beom Baek 1
Advanced Materials ( IF 27.4 ) Pub Date : 2018-12-09 , DOI: 10.1002/adma.201804440 Do Hyung Kweon 1 , Jong‐Beom Baek 1
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A scalable and low‐cost production of graphene nanoplatelets (GnPs) is one of the most important challenges for their commercialization. A simple mechanochemical reaction has been developed and applied to prepare various edge‐functionalized GnPs (EFGnPs). EFGnPs can be produced in a simple and ecofriendly manner by ball milling of graphite with target substances (X = nonmetals, halogens, semimetals, or metalloids). The unique feature of this method is its use of kinetic energy, which can generate active carbon species by unzipping of graphitic CC bonds in dry conditions (no solvent). The active carbon species efficiently pick up X substance(s), leading to the formation of graphitic CX bonds along the broken edges and the delamination of graphitic layers into EFGnPs. Unlike graphene oxide (GO) and reduced GO (rGO), the preparation of EFGnPs does not involve toxic chemicals, such as corrosive acids and toxic reducing agents. Furthermore, the prepared EFGnPs preserve high crystallinity in the basal area due to their edge‐selective functionalization. Considering the available edge X groups that can be selectively employed, the potential applications of EFGnPs are unlimited. In this context, the synthesis, characterizations, and applications of EFGnPs, specifically, as metal‐free carbon‐based electrocatalysts for dye‐sensitized solar cells (DSSCs) in both cobalt and iodine electrolytes are reviewed.
中文翻译：
边缘功能化石墨烯纳米片作为染料敏化太阳能电池的无金属电催化剂
石墨烯纳米片（GnPs）的可扩展且低成本的生产是其商业化的最重要挑战之一。已经开发了一种简单的机械化学反应并将其应用于制备各种边缘功能化的GnP（EFGnP）。EFGnP可以通过将石墨与目标物质（X =非金属，卤素，半金属或准金属）进行球磨而以简单且环保的方式生产。该方法的独特之处在于它利用了动能，该动能可以在干燥条件下（无溶剂）通过解开石墨化的CC键来生成活性炭。活性碳物质有效吸收X物质，导致形成石墨CX沿着断裂的边缘键合，石墨层分层成EFGnP。与氧化石墨烯（GO）和还原GO（rGO）不同，EFGnP的制备不涉及有毒化学物质，例如腐蚀性酸和有毒还原剂。此外，由于其边缘选择性功能化，所制备的EFGnP在基底区域保留了高结晶度。考虑到可以有选择地使用的可用边缘X组，EFGnP的潜在应用是无限的。在这种情况下，综述了EFGnP的合成，表征和应用，特别是作为钴和碘电解质中染料敏化太阳能电池（DSSC）的无金属碳基电催化剂。
更新日期：2018-12-09
中文翻译：
边缘功能化石墨烯纳米片作为染料敏化太阳能电池的无金属电催化剂
石墨烯纳米片（GnPs）的可扩展且低成本的生产是其商业化的最重要挑战之一。已经开发了一种简单的机械化学反应并将其应用于制备各种边缘功能化的GnP（EFGnP）。EFGnP可以通过将石墨与目标物质（X =非金属，卤素，半金属或准金属）进行球磨而以简单且环保的方式生产。该方法的独特之处在于它利用了动能，该动能可以在干燥条件下（无溶剂）通过解开石墨化的CC键来生成活性炭。活性碳物质有效吸收X物质，导致形成石墨CX沿着断裂的边缘键合，石墨层分层成EFGnP。与氧化石墨烯（GO）和还原GO（rGO）不同，EFGnP的制备不涉及有毒化学物质，例如腐蚀性酸和有毒还原剂。此外，由于其边缘选择性功能化，所制备的EFGnP在基底区域保留了高结晶度。考虑到可以有选择地使用的可用边缘X组，EFGnP的潜在应用是无限的。在这种情况下，综述了EFGnP的合成，表征和应用，特别是作为钴和碘电解质中染料敏化太阳能电池（DSSC）的无金属碳基电催化剂。
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