Koppers Holdings Inc. (NYSE:KOP – Get Free Report) shares hit a new 52-week high on Monday . The company traded as high as $44.59 and last traded at $44.12, with a volume of 153420 shares traded. The stock had previously closed at $43.37. Wall Street Analysts Forecast Growth A number of analysts have commented on […]
Koppers Holdings Inc. (NYSE:KOP – Get Free Report) reached a new 52-week high during trading on Monday . The stock traded as high as $44.59 and last traded at $44.12, with a volume of 153420 shares changing hands. The stock had previously closed at $43.37. Wall Street Analyst Weigh In KOP has been the topic […]
The exploration of inexpensive and efficient catalysts for oxygen reduction reaction (ORR) is crucial for chemical and energy industries. Carbon materials have been proved promising with different catalysts enabling 2 and 4e− ORR. Nevertheless, their ORR activity and selectivity is still complex and under debate in many cases. Many structures of these active carbon materials are also chemically unstable for practical implementations. Unlike the well-discussed structures, this work presents a strategy to promote efficient and stable 2e− ORR of carbon materials through the synergistic effect of lattice distortion and H-passivation (on the distorted structure). We show how these structures can be formed on carbon cloth, and how the reproducible chemical adsorption can be realized on these structures for efficient and stable H2O2 production. The work here gives not only new understandings on the 2e− ORR catalysis, but also the robust catalyst which can be directly used in industry.
Converting greenhouse gas CO2 into high-performance energy storage materials is of great significance due to its capability of simultaneously addressing environmental issues and energy crises. However, great challenges still remain for the low-carbon and energy-efficient conversion of CO2. Herein, we report an energy-efficient and time-saving strategy for converting CO2 into carbon materials by the reaction of CO2 with Mg(AlH4)2 at about 126–136 ℃ in seconds. The chemical reaction of CO2 with Mg(AlH4)2 is reported for the first time. Importantly, the graphitization degree and pore structure of as-synthesized carbon materials are found to be regulated by CO2 pressure. As a lithium storage application, the graphitization degree-dependent electrochemical performance is revealed for the carbon anodes. The highly graphitized carbon prepared at high CO2 pressure exhibits high capacity and ultra-long cycle life, delivering a high reversible capacity of 487 mAh g−1 at 1.0 A g−1 after 3
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