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乙烯在钯圆盘电极的电化学氧化研究
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作者 吴炜星 王莹 《电化学》 CAS 北大核心 2023年第1期35-42,共8页
由于巨大的潜在市场,乙烯的电化学氧化受到愈来愈多的关注。目前,主流的电化学氧化法仍以依赖于氧化还原媒介的介导氧化法为主,而这些媒介的使用在电解过程中产生大量的腐蚀性中间体,使其实际应用受到阻碍。直接电氧化法可有效规避此问... 由于巨大的潜在市场,乙烯的电化学氧化受到愈来愈多的关注。目前,主流的电化学氧化法仍以依赖于氧化还原媒介的介导氧化法为主,而这些媒介的使用在电解过程中产生大量的腐蚀性中间体,使其实际应用受到阻碍。直接电氧化法可有效规避此问题,但又受到低活性和低选择性的限制。在本工作中,我们针对目前最先进的钯催化直接氧化体系,在中性条件下开展了一系列电化学研究,以对该过程的机理获取更深入的认识。在氮气和乙烯氛围下,钯电极的循环伏安谱图有显著区别。我们发现电解过程中生成的Pd(Ⅱ)物种在乙烯氛围下可绕过原本的电化学还原路径,通过一个化学步还原为Pd(0),因此可能是乙烯氧化的活性位点。Pd(Ⅱ)物种所对应的还原峰也因此可作为乙烯吸附的数量的指标。通过电化学脉冲序列的设计,我们在钯催化剂上识别了两种具有不同吸附强度的乙烯,其强、弱吸附模式所对应的电荷转移比例约为0.3:1。弱吸附的乙烯在钯电极表面表现出可逆的吸脱附行为,而具有强吸附模式的乙烯无法通过物理过程脱附,可能指向到乙烯深度氧化过程。这项工作为进一步设计高性能乙烯直接电氧化催化剂提供了设计思路和方向。 展开更多
关键词 电氧化反应 乙烯 吸附 电环化反应
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Pricing Vulnerable Options with Correlated Credit Risk Under Jump-diffusion Processes When Corporate Liabilities Are Random 被引量:1
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作者 Qing ZHOU Jiao-jiao YANG wei-xing wu 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2019年第2期305-318,共14页
In this paper, we consider an improved model of pricing vulnerable options with credit risk. We assume that the vulnerable European options not only face default risk, but also face the rare shocks of the underlying a... In this paper, we consider an improved model of pricing vulnerable options with credit risk. We assume that the vulnerable European options not only face default risk, but also face the rare shocks of the underlying assets and the counterparty assets. The dynamics of two correlated assets are modeled as a class of jump diffusion processes. Furthermore, we assume that the dynamic of the corporate liability is a geometric Brownian motion that is related to the underlying asset and the counterparty asset. Under this new framework,we give an explicit pricing formula of the vulnerable European options. 展开更多
关键词 VULNERABLE option DEFAULT credit risk PRICING JUMP-DIFFUSION
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Corporate Financial Policies under Heterogeneous Beliefs
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作者 Wei-Ning Niu wei-xing wu +1 位作者 Leng Ling Rong-Xi Zhou 《Journal of Management Science and Engineering》 2018年第2期101-124,共24页
This study investigates a firm's financing,investment,and payout policies through a rational expectation equilibrium based on which managers and outside investors have heterogeneous prior beliefs.The proposed mode... This study investigates a firm's financing,investment,and payout policies through a rational expectation equilibrium based on which managers and outside investors have heterogeneous prior beliefs.The proposed model demonstrates that managers tend to overinvest(underinvest)if the extent of heterogeneousness is above(below)a threshold,which differs under distinct circumstances.Moreover,a price bubble is positively related to overinvestment,and the model shows that a firm's optimal financing choices and payout policies vary with the assumption of heterogeneous beliefs. 展开更多
关键词 Heterogeneous beliefs Corporate financing Investment level Cash dividend Stock repurchase
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