专有信息与授权

本文研究专有信息对授权决策的影响。代理人拥有专有信息,委托人要想利用其专有信息以增进自己的利益,就必须将活动授权给代理人,并为其提供适当的激励合约。通过明确地考虑委托人面临的外部机会及其相对于代理人的能力高低,本文表明,在一定条件下,为了利用代理人的专有信息,委托人会选择授权;并且分析了环境风险、委托人的外部机会及其相关能力等因素对授权所要求的信息质量的阈值的影响。     

超临界锅炉SCR脱硝喷氨优化调整

近年来,随着环保要求越来越严格,SCR烟气脱硝装置逐渐成为火力发电机组的必备装备。SCR脱硝装置具有运行可靠、脱硝效率高的优点,但若运行调整不当,很容易造成空预器堵塞,影响锅炉的经济性,甚至需要停炉处理。文章主要介绍SCR脱硝装置运行中的调整优化,以保证机组安全经济稳定运行。     

Graphdiyne-based metal atomic catalysts for synthesizing ammonia

Development of novel catalysts for nitrogen reduction at ambient pressures and temperatures with ultrahigh ammonia (NH₃) yield and selectivity is challenging. In this work, an atomic catalyst with separated Pd atoms on graphdiyne (Pd-GDY) was synthesized, which shows fascinating electrocatalytic properties for nitrogen reduction. The catalyst has the highest average NH₃ yield of 4.45 ± 0.30 mg_NH3 mg_Pd⁻¹ h⁻¹, almost tens of orders larger than for previously reported catalysts, and 100% reaction selectivity in neutral media. Pd-GDY exhibits almost no decreases in NH₃ yield and Faradaic efficiency. Density functional theory calculations show that the reaction pathway prefers to perform at the (Pd, C1, C2) active area because of the strongly coupled (Pd, C1, C2), which elevates the selectivity via enhanced electron transfer. By adjusting the p–d coupling accurately, reduction of self-activated nitrogen is promoted by anchoring atom selection, and side effects are minimized.