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A Review of Pd Based Multimetallic Anode Electrocatalysts for Direct Formic Acid Fuel Cells
Berdan Ulas, Hilal Kivrak
General Chemistry    DOI: 10.21127/yaoyigc20190028
Online available: 20 November 2019

On-Chip, Mediator- and Membrane-Less Micro-Glucose Biofuel Cells Based on Layer-by-Layer Reduced Graphene Oxide-Enzyme Hybrids
Mengfan Wang, Qian Tao, Bo Liu, Chengchao Li, Libao Chen, Chenglin Yan
General Chemistry    2018, 4 (2): 180001-180001.   DOI: 10.21127/yaoyigc20180001
Abstract641)   HTML54)    PDF (413KB)(452)       Save

Enzymatic biofuel cells (EBFCs) draw much attention since they use renewable fuels to generate electricity and power biological medical devices. However, such EBFCs’ application as devices has always been a puzzle to researchers, let alone their microminiaturization. Herein, we show the efficient embedding of enzymes in a porous reduced graphene oxide (RGO) matrix to form a unique sandwich structure for constructing an on-chip glucose biofuel cell (GBFC). During electrochemical deposition, laccase and glucose oxidase are incorporated in RGO layers to be used as cathode and anode materials, respectively. This GBFC delivers a maximum volumetric power density of 14.77 mW·cm-3 under physiological conditions (50 mM glucose, pH 7). Compared with previous work which is relatively large and cannot be separated from liquid phase system, our on-chip, mediator- and membrane-less micro-GBFC shows great potential to be applied as miniaturized devices to meet the rapidly growing need of being small, thin, wearable and even implantable in modern life.

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Progress in  D−A−D-type Small  Molecule  Hole-Transport Materials  for Perovskite Solar Cells
Yajie Fu, Muhammad Sohail, Aaqib Khurshid, Derong Cao
General Chemistry    2021, 7 (4): 210009-210009.   DOI: 10.21127/yaoyigc20210009
Abstract364)      PDF (1315KB)(355)       Save
As one of the key  components of perovskite solar cells (PSCs), hole transport materials (HTMs)  effectively improve the performance and stability of the devices and greatly promote the development of PSCs. At present, due to the advantages of flexible structure design, simple synthesis, low-cost and abundant raw materials, organic  small molecule HTMs have been studied extensively by researchers. Among them, small molecule HTMs  with donor–acceptor (D –A) type structures for PSCs have received great attention in the last few years because of their high hole mobility due to strong dipolar intermolecular interactions,  minimizing ohmic losses of the contact, good stability, and high solubility. In this review, we mainly introduce some representative  D−A−D-type  small molecule HTMs, summarize and comment on their properties, and discuss the relationship between molecular structure and performance parameters of devices. Finally, based on the current research, the future design of new efficient HTMs is prospected.
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