Microorganism‐Derived Heteroatom‐Doped Carbon Materials for Oxygen Reduction and Supercapacitors

Abstract

Heteroatom‐doped carbon (HDC) has attracted tremendous attention due to its promising application in energy conversion and storage. Herein, due to its abundance high rate of reproduction, the microorganism, Bacillus subtilis, is selected as a precursor. An effective ionothermal process is adopted to produce the HDCs. Using acid activation, the obtained sample exhibits excellent electrocatalytic activity, long‐term stability, and excellent resistance to crossover effects in oxygen reduction. Additionally, the base‐treated sample exhibits superior performance in capacitors to most commercially available carbon materials. Even at a high current density, a relatively high capacitance is retained, indicating a great potential for direct application in energy storage.

Synthesis of cell-penetrated nitrogen-doped carbon dots by hydrothermal treatment of eggplant sepals

“…It can be decon voluted into three peaks located at 284.5, 285.8 and 287.8 eV, assigned to C−C, C−OH and C=O, respectively [11,53]. The N1s spectrum (Figure 1(h)) decomposed at 398.5, 399.5, 400.2 and 401.5 eV are assigned to pyridinic N, C−N−C, pyrrolic N and graphitic N, respectively [11,54].…”

Nitrogen, oxygen and phosphorus decorated porous carbons derived from shrimp shells for supercapacitors

“…Many strategies have been carried for optimizing the energy density of capacitors while keeping a high power density for supercapacitors [12,13], and pseudocapacitance materials are important candidates in this respect. Surfacefunctionalized carbon materials containing heteroatoms such as nitrogen or oxygen exhibit pseudacapacitance due to charge or mass transfer between the electrode and the ions of the electrolyte [14,15]. It is known that oxygen functionalities are usually present on the surface of PC as a residue from the carbon source or a result of activation process.…”

Customized casting of unstacked graphene with high surface area (>1300 m2g−1) and its application in oxygen reduction reaction

“…However, their scarcity, high cost, and poor stability hinder the bulk applications [53]. The emergence of metalfree carbon catalyst provides a promising alternative for ORR electrocatalysis [15,16,50,51,[53][54][55][56][57][58][59][60][61][62]. In this contribution, ORR was selected as the probe reaction to explore the electrocatalytic performance of unstacked DTG and NDTG.…”